Koshiro Igarashi

https://www.oricon.co.jp/news/2257599/ is the youngest child and third son of the Igarashi siblings. He appears exclusively in Kamen Rider Geats × Revice: Movie Battle Royale.
==History==
Koshiro Igarashi is fourth-born child of Genta and Yukimi Igarashi, and the youngest brother to Ikki, Daiji and Sakura. He was born approximately nine months after Ikki and Vice's final battle.
==Powers==
*Giff's Offspring Physiology: Like his siblings, Koshiro is infused with Giff's DNA from birth. 
*Inner Demon Control: As a side effect of inheriting Giff's genes, Koshiro is born with an inner devil with its own unique appearance. He also has the potential to keep his inner demon under control.
==Relationships==
===Family===
Ikki Igarashi.png|Ikki IgarashiElder brother
Daiji Igarashi.png|Daiji IgarashiElder brother
Sakura Igarashi.png|Sakura IgarashiElder sister
Yukimi Igarashi.png|Yukimi IgarashiMother
Genta Igarashi.png|Genta IgarashiFather
Junpei Shiranami's parents.png|Unnamed grandparents(both deceased)
Giff.png|GiffGenetic relative
* Koshiro Igarashi's Inner Demon: Koshiro's inner demon following Vice with Ikki, Kagero with Daiji & Lovekov with Sakura.
==Behind the Scenes==
===Portrayal===
Koshiro Igarashi is portrayed by . 
===Etymology ===
*Like the rest of his family, the Igarashi surname contains the kanji for "fifty" (五十嵐), which is likely a nod to Revice commemorating the 50th anniversary of the Kamen Rider franchise.
*Koshiro's first name (幸四郎) contains the kanji for "four", referencing his status as the fourth-born child of the Igarashis.
==Notes==
*The idea of a fourth Igarashi child was conceived by producer Taku Mochizuki that came up with during a chat with Hanta Kinoshita, who expressed some doubts but was nonetheless surprised with the results.『仮面ライダーギーツ×リバイス MOVIEバトルロワイヤル』パンフレット 2022年12月23日発行 構成・編集・文：用田邦憲 発行所：東映事業推進部
==Appearances==
* Kamen Rider Revice
** Kamen Rider Geats × Revice: Movie Battle Royale
==Navigation==
Category:Revice Characters
Category:Relatives
Category:Movie-exclusive Characters