Matou Kariya

Matou Kariya is a character from Fate/Zero

HARD WORK
A hard working man. Wants to save wormslut. Is a wormanslut too. Has magic cancer.

Season 0/original
Originally part of Season 0.

Season 0
Matou Kariya was Kiryu Kazuma's sworn brother after they grew up at Kasai's Orphanage. He was rejected by his family after running away from their inhuman practices.

When both of them were adopted by the Sonozaki Family, they were taught many things by Steven Sonozaki.

During the time when his niece was about to undergo an operation to remove her worms, Kiryu takes the blame for him killing Sakura's mother, so that he can be with his niece. However, the operation turns out to be a scam, and instead she's pumped full with even more and bigger worms.

This drives Kariya into despair, and he decides he will work hard to reach the top, and injects himself with worms to that extent. He decided to ally himsellf with Sudou Tatsuzou, a politician with ties with the Sonozaki Family that could help him gain control of it.

However, when Kiryu goes to the Millennium Tower to confront him, Sudou reveals he's betraying Kariya and the Sonozaki and attempts to kill Kiryu, but Kariya stops him, and despite Sudou fatally wounding him, he uses his magecraft to blow themselves up along with the keyboards.