# List of Kamen Rider Gavv characters

Kamen Rider Gavv (仮面ライダーガヴ, Kamen Raidā Gavu) is a Japanese tokusatsu series that is the 35th installment in the Kamen Rider franchise and the sixth entry in the Reiwa era.

## Main characters
### Shoma

Shoma Stomach (ショウマ・ストマック, Shōma Sutomakku) is a human-Granute hybrid and former member of the Stomach Family who turned against them after they killed his human mother Michiru, including Hanto's mother Sae, when he discovered the truth behind his family's conspiracy. Upon arriving in the human world, he renames himself Shoma Inoue (井上 生真, Inoue Shōma) to honor the memory of his mother and vows to protect humanity from his former family and the Granutes.
Utilizing the Poppingummy Gochizo in conjunction with his modified belt-like Gavv (ガヴ, Gavu) organ, also known as the "Aka Gavv" (赤ガヴ, Aka Gavu, Red Gavv), attached to his abdomen, Shoma can transform into Kamen Rider Gavv Poppingummy Form (ポッピングミフォーム, Poppingumi Fōmu). While transformed, he gains armor regeneration capabilities. He also wields the Gavvgablade (ガヴガブレイド, Gavugabureido) sword, which allows him to launch Gochizo set in the Gochispeeder (ゴチスピーダー, Gochisupīdā) projectile as a feint attack. His personal vehicle is the Vrocan Buggy (ブルキャンバギー, Burukyan Bagī) ATV, which is summoned from the Vrocan Gochizo and can assume an alternate motorcycle form. Shoma later receives the Gavvphone (ガヴフォン, Gavufon), which can be used to project a Gochizo's memories, from his great-uncle Dente. Additionally, he can assume a variety of forms and/or enhanced Assist (アシスト, Ashisuto) versions using other Gochizo, which are as follows:
* Kickingummy Assist (キッキングミアシスト, Kikkingumi Ashisuto): An enhanced version of Poppingummy Form accessed from the Kickingummy Gochizo that equips Shoma with the Range Kicking (レンジキッキング, Renji Kikkingu) sabaton.
* Zakuzakuchips Form (ザクザクチップスフォーム, Zakuzakuchippusu Fōmu): An auxiliary form accessed from the Zakuzakuchips Gochizo that grants proficiency in sword fighting. In this form, Shoma dual wields the twin regenerative ZakuzakuchipSlasher (ザクザクチップスラッシャー, Zakuzakuchippusurasshā) scimitars.
** Hirihirichips Assist (ヒリヒリチップスアシスト, Hirihirichippusu Ashisuto): An enhanced version of Zakuzakuchips Form accessed from the Hirihirichips Gochizo that grants pyrokinesis.
* Punchingummy Assist (パンチングミアシスト, Panchingumi Ashisuto): An enhanced version of Poppingummy Form accessed from the Punchingummy Gochizo that equips Shoma with the Schwa Punching (シュワパンチング, Shuwa Panchingu) gauntlet. This form first appears in the film Kamen Rider Gotchard: The Future Daybreak.
* Fuwamallow Form (ふわマロフォーム, Fuwamaro Fōmu): An auxiliary form accessed from the Fuwamallow Gochizo that grants bouncing capabilities and proficiency in hand-to-hand combat.
** Marumallow Assist (まるマロアシスト, Marumaro Ashisuto): An enhanced version of Marumallow Form accessed from the Marumallow Gochizo that grants size alteration capabilities.
* Chocodan Form (チョコダンフォーム, Chokodan Fōmu): An auxiliary form accessed from the Chocodan Gochizo that grants proficiency in sharpshooting. In this form, Shoma wields the Chocodan Gun (チョコダンガン, Chokodan Gan).
** Chocodon Assist (チョコドンアシスト, Chokodon Ashisuto): An enhanced version of Chocodan Form accessed from the Chocodon Gochizo that grants the use of the Chocodon Gun (チョコドンガン, Chokodon Gan), which Shoma can either dual wield alongside the Chocodan Gun or lend to Kamen Rider Valen.
* Gurucan Form (グルキャンフォーム, Gurukyan Fōmu): An auxiliary form accessed from the Gurucan Gochizo that grants exosuit-like heatproof armor. In this form, Shoma wields the double-barreled Vrocan Gatling (ブルキャンガトリング, Burukyan Gatoringu) rotary cannon, which is created from the Vrocan Buggy.
** Bakucan Assist (バクキャンアシスト, Bakukyan Ashisuto): An enhanced version of Gurucan Form accessed from the Bakucan Gochizo that equips Shoma with the twin shoulder-mounted Rock Bakucannons (ロックバクキャノン, Rokku Bakukyanon).
* Bushel Form (ブシュエルフォーム, Bushueru Fōmu): An auxiliary form accessed from the Bushel Gochizo that grants chlorokinesis. In this form, Shoma wields the Xmax (クリスマックス, Kurisumakkusu) battle axe.
* Kickingummy & Punchingummy Assist (キッキングミ&パンチングミアシスト, Kikkingumi Ando Panchingumi Ashisuto): A fusion form accessed from the Kickingummy and Punchingummy Gochizo.
* Caking Form (ケーキングフォーム, Kēkingu Fōmu): An upgrade form accessed from the Caking Gochizo that grants photokinesis. In this form, Shoma wields the Gavvwhipir (ガヴホイッピア, Gavuhoippia) lance, which allows him to summon a pair of humanoid Whipped Soldiers (ホイップ兵, Hoippu-hei) each wielding a Whipped Rod (ホイップロッド, Hoippu Roddo) spear for combat assistance. He can also augment the Whipped Soldiers with the abilities and/or weaponry of his preexisting forms via their corresponding Gochizo. However, extended use of the Caking Gochizo will consume Shoma's energy, causing him to starve once he cancels his transformation.
* Blizzardsorbet Form (ブリザードソルベフォーム, Burizādosorube Fōmu): Shoma's super form accessed from the Blizzardsorbei Gochizo that grants cryokinesis and the use of varying Atari (アタリ) abilities. In this form, he can wield the Gavvwhipir if the Blizzardsorbei Gochizo was created from ice cream cake, allowing him to summon a pair of evolved Ice Whipped Soldiers (アイスホイップ兵, Aisu Hoippu-hei). However, Shoma can only assume this form for a certain amount of time before the Blizzardsorbei Gochizo melts, forcibly cancelling his transformation as a result.
Shoma is portrayed by Hidekazu Chinen (知念 英和, Chinen Hidekazu). As a child, Shoma is portrayed by Haru Takagi (高木 波瑠, Takagi Haru).

### Hanto Karakida

Hanto Karakida (辛木田 絆斗, Karakida Hanto) is a freelance writer investigating Shoma and the Granutes. He was orphaned at a young age, having lost his mother Sae to the hands of Stomach Inc. officers when he and Shoma were children, and his grandmother passed away sometime afterwards. In high school, he was taken under Shioya's wing and became his assistant. After being implanted with a Granute organ by Suga, Hanto gains the ability to transform into Kamen Rider Valen (仮面ライダーヴァレン, Kamen Raidā Varen).
Utilizing the Chocodon Gochizo in conjunction with the Valen Buster (ヴァレンバスター, Varen Basutā) firearm, Hanto can transform into Kamen Rider Valen Chocodon Form (チョコドンフォーム, Chokodon Fōmu). While transformed, he can borrow a Chocodon Gun from Kamen Rider Gavv to dual wield alongside the Valen Buster. Additionally, he can assume a variety of forms using other Gochizo, which are as follows:
* Doumaru Form (ドーマルフォーム, Dōmaru Fōmu): An auxiliary form accessed from the Doumaru Gochizo that equips Hanto with the twin arm-mounted expandable Doumaru Grab Ring (ドーマルグラブリング, Dōmaru Gurabu Ringu) discs.
* Bushel Form: An auxiliary form accessed from the Bushel Gochizo that grants chlorokinesis. In this form, Hanto wields the Xmax.
* Chocold Form (チョコルドフォーム, Chokorudo Fōmu): An upgraded version of Chocodon Form accessed from the Chocold Gochizo that grants umbrakinesis.
Hanto Karakida is portrayed by Yusuke Hino (日野 友輔, Hino Yūsuke). As a child, Hanto is portrayed by Yura Kimura (木村 優来, Kimura Yura).

### Sachika Amane

Sachika Amane (甘根 幸果, Amane Sachika) is the CEO of the jack of all trades Hapipare (はぴぱれ) shop where Shoma works and lives. She uses her connections on social media to help Hanto with his work, and later to help the Kamen Riders protect humans from Stomach Inc., especially after Shoma tells her the truth about himself.
Sachika Amane is portrayed by Nozomi Miyabe (宮部 のぞみ, Miyabe Nozomi).

### Rakia Amarga

Rakia Amarga (ラキア・アマルガ, Rakia Amaruga), code-named Lage Nine (ラーゲ9, Rāge Nain), is a jellyfish-themed Granute miner who lost his younger brother Comel (コメル, Komeru) due to an incident caused by Dark Treats, where he ended up being disposed of for discovering the truth. Upon being hired by Lango as punishment for attempting to steal Dark Treats from a nearby available stall and secretly planning to destroy them, Rakia uses this opportunity to destroy Stomach Inc. from the inside while regretfully serving as their part-timer for the time being. He possesses the ability to generate energy tentacles that can paralyze his victims into euphoric states, allowing him to capture several humans all at once. When he was briefly promoted by Nyelv from part-timer to enforcer, before his true intention to destroy Stomach Inc. is exposed, Rakia gains the ability to transform into Kamen Rider Vram (仮面ライダーヴラム, Kamen Raidā Vuramu).
Utilizing the Doppudding Gochizo in conjunction with the Vrastum Gear (ヴラスタムギア, Vurasutamu Gia) belt, Rakia can transform into Kamen Rider Vram Pudding Custom (プリンカスタム, Purin Kasutamu). While transformed, he retains the use of his energy tentacles. He also wields the Vram Breaker (ヴラムブレイカー, Vuramu Bureikā), which can switch between Bow Mode (弓モード, Yumi Mōdo) and Sickle Mode (鎌モード, Kama Mōdo). Additionally, he can assume a variety of Custom (カスタム, Kasutamu) forms using other Gochizo, which are as follows:
* Jelly Custom (ゼリーカスタム, Zerī Kasutamu): An auxiliary form accessed from the Purujelly Gochizo that grants invisibility. However, using this ability is potentially fatal, as it will cause Rakia's heart to stop beating while in effect.
Rakia Amarga is portrayed by Kohei Shoji (庄司 浩平, Shōji Kōhei).

## Recurring characters
### Granutes

The Granutes (グラニュート, Guranyūto) are a race of monsters from the Granute World (グラニュート界, Guranyūto-kai) that, like Shoma, have Gavv mouths on their abdomens, with staple food for their diets is a chuck of hard object, such as rock and metal. They possess the ability to turn humans into ribboned Hito Press (ヒトプレス, Hito Puresu, Human Press) plates using long tongues from their modified Gavvs. In order to save the trapped victims from having their happiness being used as ingredients for Dark Treats, the Hito Press' ribbons must be cut without breaking the victims' plate-like state. Utilizing a Mimic Key (ミミックキー, Mimikku Kī) USB flash drive in conjunction with their modified Gavvs, or Mimic Deviser (ミミックデバイザー, Mimikku Debaizā) belts in the case of the Stomach Family members, the Granutes can assume human forms.

#### Stomach Family

The Stomach Family (ストマック家, Sutomakku-ke) is an upper-class family who run the Stomach Inc. (ストマック社, Sutomakku-sha) confectionery company in the Granute World, co-founded by the brothers Dente and Zomb, with Zomb served as an acting CEO. The Stomach Inc. was originally a legitimate company, until Zomb corrupted it, when he and most of his descendants begin to manufacture Dark Treats (闇菓子, Yamigashi) illegally as part of their plan to take over the Granute World. As human happiness is an ingredient needed for their Dark Treats, the siblings kidnap happy humans to process them into ingredients. Because of how addictive Dark Treats are for the consumers, it puts the Granute World's civilization into chaos, driving the inhabitants who consumed it once into stealing confectionary from the nearest available stalls.

##### Lango Stomach

Lango Stomach (ランゴ・ストマック, Rango Sutomakku) is the goat-themed eldest son of the Stomach Family and the CEO of Stomach Inc. He is also the murderer of Hanto's mother.
Lango Stomach is portrayed by Takashi Tsukamoto (塚本 高史, Tsukamoto Takashi).

##### Glotta Stomach

Glotta Stomach (グロッタ・ストマック, Gurotta Sutomakku) is the kraken-themed eldest daughter of the Stomach Family, who is in charge of product manufacturing. She is also the murderer of Shoma's mother.
In battle, Glotta wields a scythe.
Glotta Stomach is portrayed by Machi Chitose (千歳 まち, Chitose Machi).

##### Nyelv Stomach

Nyelv Stomach (ニエルブ・ストマック, Nierubu Sutomakku) is the piranha-themed second son of the Stomach Family, who is in charge of technology development, and formerly his great-uncle Dente's disciple. Upon learning of Dente's Kamen Rider system surgery through modifying Shoma's Gavv, followed by Suga's Kamen Rider system compatible surgery on humans proving to be successful, Nyelv becomes interested in gathering the Kamen Riders' combat data. He is directly responsible for Hanto becoming a Kamen Rider, having sent Otake to kill his mentor Shioya and steal the lower half of his Hito Press before Hanto found the upper half.
Nyelv Stomach is portrayed by Ryo Takizawa (滝澤 諒, Takizawa Ryō).

##### Siita Stomach

Siita Stomach (シータ・ストマック, Shīta Sutomakku) is the Sköll-themed youngest daughter of the Stomach Family and the twin sister of Jiip, who is in charge of ingredient procurement and dresses like a boy. She is later fired from the company due to her failures. She ultimately sacrifices herself to save Jiip from being destroyed by Kamen Rider Gavv.
In battle, Siita wields a handgun.
Siita Stomach is portrayed by Honoka Kawasaki (川﨑 帆々花, Kawasaki Honoka).

##### Jiip Stomach

Jiip Stomach (ジープ・ストマック, Jīpu Sutomakku) is the Hati Hróðvitnisson-themed third son of the Stomach Family and the twin brother of Siita, who is in charge of ingredient procurement and dresses like a girl. He is later fired from the company due to his failures. Following Siita's sacrifice, Jiip has a nervous breakdown and cuts his hair to resemble his late sister, swearing to enact revenge on Shoma.
In battle, Jiip wields a machete whose hilt stores a hidden dagger.
Jiip Stomach is portrayed by Ruito Koga (古賀 瑠, Koga Ruito).

##### Dente Stomach

Dente Stomach (デンテ・ストマック, Dente Sutomakku) is the whale-themed great-uncle of Shoma and a researcher from the Stomach Family. When he and his brother Zomb co-founded Stomach Inc., Dente was unaware of his brother's crimes on kidnapping humans for the Dark Treats' ingredients, and his brother's influences affected his descendants, barring Shoma. At the behest of his nephew Bouche, Dente was responsible for Shoma's transformation into a Kamen Rider through surgically modifying his Gavv, and is directly responsible for the Gochizo's existence. After the surgery was a success, he went to live as a recluse in the human world's mountains.
Dente Stomach is voiced by Yōhei Tadano (多田野 曜平, Tadano Yōhei).

##### Bouche Stomach

Bouche Stomach (ブーシュ・ストマック, Būshu Sutomakku) was the father of Shoma and the Stomach siblings and the former second CEO of Stomach Inc. He fell in love with Michiru and took her to live with him in the Granute World. The reason he pretended to be abusive towards Shoma and Michiru was to protect them from being betrayed by Stomach siblings at early ages, who has since being corrupted by his father's influence, and ultimately entrusted his uncle Dente to modify Shoma's Gavv so that he may transform him into a Kamen Rider and surpass his former siblings and atone Stomach's name. Following Bouche's death, Shoma's older siblings take over the family business, leading to his wife's death by their hands and Shoma's escape to the human world.
Bouche Stomach is voiced by Ryota Takeuchi (竹内 良太, Takeuchi Ryōta).

##### Zomb Stomach

Zomb Stomach (ゾンブ・ストマック, Zonbu Sutomakku) was the paternal grandfather of the Stomach siblings, the older brother of Dente, and the founder of Stomach Inc. He was responsible for using kidnapped humans as the secret ingredients of the Dark Treats without Dente's notice, leading to Dente getting disilusioned and abandon the family after modifying Shoma's Gavv.
Zomb Stomach is voiced by Bin Shimada (島田 敏, Shimada Bin).

#### Agents

The Agents (エージェント, Ējento) are humanoid servants of the Stomach Family and the in-person link between Stomach Inc. and their part-timers blending in with human society. Each Agent is created by a Stomach Family member in a similar fashion to how Shoma creates the Gochizo. They give Dark Treats to the company's part-timers in return for the humans they kidnapped.
The Agents are voiced by Kōki Sakurai (櫻井 皓基, Sakurai Kōki) and Ayu Shōji (東海林 亜祐, Shōji Ayu).

#### Part-timers

The part-timers are Granutes addicted to Dark Treats who are hired by Stomach Inc. to kidnap humans for the company in exchange for more of the aforementioned confection. Each Granute is given a code name while working as a part-timer.
* Hound (ハウンド, Haundo): A hound-themed Granute whose human form is a man with glasses. He is destroyed by Kamen Rider Gavv. His human form is portrayed by Jin Katagiri (片桐 仁, Katagiri Jin).
* Whiple (ウィップル, Wippuru): An octopus-themed Granute whose human form is a jogger. He is destroyed by Kamen Rider Gavv. His human form is portrayed by Yoshiyuki Tsubokura (坪倉 由幸, Tsubokura Yoshiyuki).
* Bon (ボン): A porcupinefish-themed Granute whose human form is a female food truck employee. He is destroyed by Kamen Rider Gavv. Voiced by Akihiko Ishizumi (石住 昭彦, Ishizumi Akihiko) while his human form is portrayed by Kana Takanashi (小鳥遊 可奈, Takanashi Kana).
* Otake (オタケ): A mushroom-themed Granute whose human form is a street illusionist performer. He occasionally uses a "disappearing act" stunt by covering himself and his victims in his robe to avoid his identity being noticed, until Shoma exposes his Gavv to the public. His upper body contains a mucus that allows him to survive Kamen Rider Gavv's Gummy Gochizo-themed finishers. Outside of his false street performances, Otake was hired by Nyelv to kill Hanto's mentor Shioya and steal his Hito Press' lower half for Nyelv before Hanto found the upper half. In retaliation for murdering Shioya, he is destroyed by a vengeful Hanto, who had finished undergoing surgery to become Kamen Rider Valen. His human form is portrayed by Junichiro Nishino (西野 純一郎, Nishino Jun'ichirō).
* Dean (ディーン, Dīn): A sardine-themed Granute whose human forms are a gallery manager named Katsumi Iwashimizu (岩清水 克美, Iwashimizu Katsumi) and an Italian art dealer named Amant Sardina (アマント・サルディーナ, Amanto Sarudīna). He possesses the ability to clone himself. As a result of Sachika's interference, the real Dean is destroyed by both Kamen Riders Gavv and Valen. His human forms of Katsumi Iwashimizu and Amant Sardina are portrayed by Yōhei Kaneshige (金重 陽平, Kaneshige Yōhei) and Kourosh Amini respectively.
* Yard (ヤード, Yādo): A hermit crab-themed Granute whose human form is a cake shop owner. He likes to kidnap children and possesses the ability to merge with a location he took over to assume his full form while housing the victims he kidnapped within his shell. He is destroyed by Kamen Rider Gavv. His human form is portrayed by Ryotaro Akazawa (赤澤 遼太郎, Akazawa Ryōtarō).
* Early (アーリー, Ārī): An alligator-themed Granute whose human form is an elementary school student. He performs a social romance scam to lure female victims under different aliases, such as "Niwa" (ニワ) and "Getaro" (ゲタロウ, Getarō), while framing Hanto in the process. He is destroyed by Kamen Rider Gavv, with Kamen Rider Valen's civilian identity having been cleared. Voiced by Miou Tanaka (田中 美央, Tanaka Miō) while his human form is portrayed by Gaku Katō (加藤 岳, Katō Gaku).
* Rojoe (ロジョー, Rojō): A crab-themed Granute whose human form is a street musician named Kani (可児). He is destroyed by Kamen Riders Gavv and Valen. His human form is portrayed by Yosuke Kishi (岸 洋佑, Kishi Yōsuke).
* Chooul (チョール, Chōru): A bird-themed Granute whose human form is a woman with a red scarf, white outfit, and beige hat. Upon his true identity being exposed, Chooul suffers a breakdown into publicly revealing his true form and kidnapping his victims, leading to his demise at the hands of Kamen Rider Gavv. Voiced by Tomoaki Maeno (前野 智昭, Maeno Tomoaki) while his human form is portrayed by Nanami Kameda (龜田 七海, Kameda Nanami).
* Smeeal (スミール, Sumīru): An octopus-themed Granute whose human form is a yakiniku restaurant owner. He was a close friend of Otake, whom Hanto destroyed in his first time as a Kamen Rider. He exploits a greedy desire of Hanto's old friend Kataro Kentani (拳谷 加太郎, Kentani Katarō) into betraying Hanto, then betrays Kataro as well before attempting to kill Hanto to avenge Otake. However, due to the interference of the Chocold Gochizo who grants Kamen Rider Valen a new power, Smeeal is ultimately destroyed. His human form is portrayed by Pink Machiura (街裏 ぴんく, Machiura Pinku).
* Le Beet (ル・ビート, Ru Bīto): A Japanese rhinoceros beetle-themed Granute who stole the VTube persona account of Koji Minamoto (源 浩二, Minamoto Kōji) to lure his victims and frame Koji, due to losing his Mimic Key. He also possesses information related to the death of Rakia's brother Comel. When Rakia's infiltration of Stomach Inc. is exposed, Le Beet accepts the bounty put on the former's head, only to be destroyed by him, thus clearing Koji's name. Voiced by Yūki Ono (小野 友樹, Ono Yūki).

### Gochizo

The Gochizo (ゴチゾウ, Gochizō) are tiny snack-themed familiars who are born from Shoma's Gavv and/or the Dark Shoma's Bitter Gavv after they consume human world snacks and grant access to the Riders' powers. Their species' namesake is coined by Sachika. Gochizo normally have limited lifespans, as they will pass away after being used as transformation items. However, there are certain Gochizo who can be used more than once, such as the immortal Caking or any of the artificial Gochizo created from Nyelv and Suga's research.
* Poppingummy (ポッピングミ, Poppingumi): A grape-themed Gummy (グミ, Gumi) subspecies.
* Vrocan (ブルキャン, Burukyan): A lollipop-themed Candy (キャンディ, Kyandi) subspecies.
* Kickingummy (キッキングミ, Kikkingumi): An orange-themed Gummy subspecies.
* Zakuzakuchips (ザクザクチップス, Zakuzakuchippusu): A potato chip-themed Snack (スナック, Sunakku) subspecies.
* Punchingummy (パンチングミ, Panchingumi): A soda-themed Gummy subspecies.
* Fuwamallow (ふわマロ, Fuwamaro): A vanilla-themed Marshmallow (マシュマロ, Mashumaro) subspecies.
* Marumallow (まるマロ, Marumaro): A strawberry-themed Marshmallow subspecies.
* Hirihirichips (ヒリヒリチップス, Hirihirichippusu): A spicy potato chip-themed Snack subspecies.
* Chocodon (チョコドン, Chokodon): A white chocolate-themed Choco (チョコ, Choko) subspecies.
* Chocodan (チョコダン, Chokodan): A milk chocolate-themed Choco subspecies.
* Gurucan (グルキャン, Gurukyan): A spiral lollipop-themed Candy subspecies.
* Bakucan (バクキャン, Bakukyan): A drop-themed Candy subspecies.
* Doumaru (ドーマル, Dōmaru): A sprinkles-themed Doughnut (ドーナツ, Dōnatsu) subspecies.
* Bushel (ブシュエル, Bushueru): A Yule log-themed Cake (ケーキ, Kēki) subspecies.
* Caking (ケーキング, Kēkingu): A strawberry cake-themed Cake subspecies.
* Doppudding (どっプリン, Doppurin): A crème caramel-themed Pudding (プリン, Purin) subspecies.
* Purujelly (ぷるゼリー, Puruzerī): A cherry-themed Jelly (ゼリー, Zerī) subspecies.
* Sparkingummy (スパーキングミ, Supākingumi): A cola-themed Gummy subspecies.
* Vrocan Spicy (ブルキャンスパイシー, Burukyan Supaishī): A brown sugar lollipop-themed Candy subspecies.
* Chocold (チョコルド, Chokorudo): A dark chocolate-themed Choco subspecies.
* Blizzardsorbei (ブリザードソルベエ, Burizādosorubē): An ice cream-themed Ice (アイス, Aisu) subspecies.
The Gochizo are voiced by Kōki Sakurai and Ayu Shōji, who also voice the Stomach Family agents. Blizzardsorbei is voiced by Kazuki Kyan (喜屋武 和輝, Kyan Kazuki).

### Soji Shioya

Soji Shioya (塩谷 壮士, Shioya Sōji) is a freelance writer, and Hanto's mentor and father figure. He is assassinated by Otake, who was sent by Nyelv to break his Hito Press into two halves, with his lower half falling into Nyelv's hands while Hanto secures his upper half.
Soji Shioya is portrayed by Toshimasa Komatsu (小松 利昌, Komatsu Toshimasa).

### Michiru Inoue

Michiru Inoue (井上 みちる, Inoue Michiru) is Shoma's human mother. After discovering the truth behind how the Stomach Family makes Dark Treats, she made Shoma promise never to eat their products. Ultimately, her son begun to keep his promise to her when he witnessed how the Dark Treats were created after witnessing the death of Hanto's mother at the hands of Lango. The Stomach Family later turned Michiru into a Hito Press for their Dark Treats and was killed by Glotta in front of Shoma, causing her son to defect from them and adopt her maiden name.
Michiru Inoue is portrayed by Arisa Nakajima (中島 亜梨沙, Nakajima Arisa).

### Sae Karakida

Sae Karakida (辛木田 早恵, Karakida Sae) was Hanto's mother who fell into the hands of Stomach Inc. when her son was still a child. Upon being kidnapped by an unidentified canine-themed Granute and taken to Stomach Inc. to be used as ingredients for Dark Treats, she managed to escape and decided to help Shoma find his mother. However, in the midst of finding Michiru and learning the truth behind the company's shady activities with Shoma, Lango captured Sae once again and ultimately turned her into Dark Treats in front of Shoma. As a result, it was her death that made Shoma finally understand why his mother warned him about the Dark Treats.
Sae Karakida is portrayed by Miwako Wagatsuma (我妻 三輪子, Wagatsuma Miwako).

### Kenzo Suga

Kenzo Suga (酸賀 研造, Suga Kenzō) is a mysterious Granute researcher who is in cahoots with Nyelv. At some point, he acquired a Granute organ for his Kamen Rider system compatible surgery on humans. Following Shoma's appearance as Kamen Rider Gavv, Suga took one of the former's Chocodon Gochizo and used their sample to create the Valen Buster. After Hanto loses his mentor Shioya at the hands of Otake, Suga accepts Hanto's request to transform the latter into a Kamen Rider by implanting the aforementioned Granute organ into him.
Kenzo Suga is portrayed by Shintarō Asanuma (浅沼 晋太郎, Asanuma Shintarō).

### Dark Shoma

Dark Shoma (ダークショウマ, Dāku Shōma) is a series of evil clones of Shoma created by Suga using a sample of his hair and blood who possess the ability to transform into Kamen Rider Bitter Gavv (仮面ライダービターガヴ, Kamen Raidā Bitā Gavu). Each clone has a different personality, despite all of them being prone to violence and destruction, and are tasked by their master to become more and more strong in order to transform into what they call "the ultimate life form".
Similarly to Shoma, the Dark Shoma utilize the Sparkingummy Gochizo in conjunction with their belt-like Bitter Gavv (ビターガヴ, Bitā Gavu) organ attached to their abdomen to transform into Kamen Rider Bitter Gavv Sparkingummy Form (スパーキングミフォーム, Supākingumi Fōmu). While transformed, they gain self-healing capabilities. They also wield the serrated Bitter Gavvgablade (ビターガヴガブレイド, Bitā Gavugabureido) sword, which allows them to absorb up to three Gochizo and channel their abilities at once. Their personal vehicle is the Vrocan Buggy Spicy (ブルキャンバギースパイシー, Burukyan Bagī Supaishī) ATV, which is summoned from the Vrocan Spicy Gochizo and can transform into the double-barreled Vrocan Gatling Spicy (ブルキャンガトリングスパイシー, Burukyan Gatoringu Supaishī) rotary cannon.
The Dark Shoma are portrayed by Hidekazu Chinen, who also portrays Shoma.