Family or the World... Brothers Quarrel of the Soul!

is the fortieth episode of Kamen Rider Revice. It features the debut of Akaishi's Giffdemos form and the death of Tasuke Ushijima.
==Synopsis==
The three Igarashi siblings have finally crossed their fists. Weekend now views Daiji as the enemy, and Tasuke suggests the Riders to become emotionless in order to beat Giff. Sakura is shocked by Tasuke's words, while Hikaru lashes out at him in violence. 
Meanwhile, Ikki decides to settle this one-one-one with Daiji like brothers. Will they submit to Giff or attempt to overthrow his attempted invasion? 
The brotherly battle for humankind, though their goal is the same, their differing methods will clash with each other's pride!
==Plot==
to be added
==Cast==
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*Revice Driver, Vistamps: 
===Guest Cast===
*Ikki Igarashi (Child): 
*Daiji Igarashi (Child): 
===Suit Actors===
*Kamen Rider Revi: 
*Vice, Kamen Rider Vice: 
*Kamen Rider Live, Masumi Karizaki: 
*Kamen Rider Jeanne: 
*Lovekov: 
*Kamen Rider Over Demons: 
*Kamen Rider Aguilera: 
*Vail: 
*Giffdemos (Hideo Akaishi): 
==Forms and Collectibles Used==
===Vistamps===
*Stamp Used:
**Revi
***Giffard Rex
**Vice
***Giffard Rex
**Live
***Holy Wing
**Jeanne
***Cobra, Hashibiroko
**Over Demons
***Kuwagata
**Aguilera
***Queen Bee
*Form Used:
**Revi
***Ultimate Revi
**Vice
***Ultimate Vice
**Live
***Holy Live
**Jeanne
***Cobra Genome
**Lovekov
***Hashibiroko Genome
**Over Demons
***Kuwagata Genome
**Aguilera
***Queen Bee Genome
==Errors==
*While transforming, Jeanne immediately transforms Lovekov into her Hashibiroko Genome.
*When Holy Live is talking to Revi towards the end of the episode, the camera crew can be seen in his helmet's reflection.
==Notes==
*As part of Super Hero Time, this episode aired alongside episode 16, .
*Closing Screen
**Kamen Riders: Revice
**Vistamps: Giffard Rex
*Count at episode end
**Vistamps in Revi's possession: Rex, Eagle, Mammoth, Megalodon, Ptera, Lion, Kong, Kamakiri, Brachio, Neo Batta, Kangaroo, Barid Rex, Volcano, Rolling, Thunder Gale, Giffard Rex
**Vistamps in Live's possession: Bat, Jackal, Holy Wing
**Vistamps in Jeanne's possession: Cobra, Kujaku, Turtle, Hashibiroko
**Vistamps in Over Demons' possession: Kuwagata, Mogura
**Vistamps in Aguilera's possession: Queen Bee
**Vistamps in George's possession: Spider, Batta, Condor, Scorpion, Anomalocaris
**Vistamps in Vail's possession: Buffalo
**Vistamps in Fenix's possession: White Leo, Quetzalcoatlus, Triceratops, Giff Junior
**Vistamps in unknown possession: Kabuto
**Proto Vistamps in Fenix's possession: Cheetah, Koala, Elephant, Shark, Rafflesia, Planarian, Sabertiger, Chameleon, Kajiki
**Proto Vistamps in unknown possession: Wolf, Daiouika
*During his battle against the Weekend Riders, Akaishi recites , a popular battle standard used by the Sengoku-era daimyo Takeda Shingen, which in turn is quoted from Sun Tsu's .
==External links==
*TV Asahi's official episode guide for 家族か世界か…魂の兄弟喧嘩！
*KR Official's official episode guide for 家族か世界か…魂の兄弟喧嘩！
*JAE's official episode guide for 家族か世界か…魂の兄弟喧嘩！