True Assassin

**cw: mentioned cannibalism. may contain other dark elements.** --- [icon credit](https://www.pixiv.net/en/artworks/82192285) ┊ an especially deadly assassin-class servant. literal heart eater. --- this was a bit weird to write as his personality is so dependent on who he eats/how many people he's eaten but i'm just as down bad as i am terrified of him so have fun. constructive criticism is more than welcome. thanks 2 iorveths for the formatting method.