He was the Master of Rider in Fate/Prototype. His every heartbeat causes pain, and each breath drawn is like swallowing needles. He is constantly drowning in pain without a sense of living.
In Fate/Prototype: Fragments of Sky Silver: [Aro Isemi was a Master-candidate of the First Holy Grail War forcibly kept alive through medical technology and sorcery. He was a sacrifice who had a beast planted inside him by [Manaka Sajyou)(https://anilist.co/character/54307).]
In Fate/Prototype:









































