Tyress tsubasamaru said:
(after kyoki klled his sister he went insane for 5 years before learning how to use his alchemy to rekeep his mind in check, when he signed up for stigmata, he did so on his own accord through severaly brief moments of sanity so that he could make himself immortal long enought to control his emotions, 70% of his brain is devoted to controlling the alchemy that helps his body function, and the other thirty is a mix between basic body functions and chaotic thoughts and memories)
voila
