Originally Posted by
Bridget
SHIKI is a bit like the Gilgamesh of Tsukihime, role-wise, he's the dude who's always the villain but whose motivation and acting in the story changes wildly to fit the story's necessities.
In one route, he's Roa and wants that Arc pussy
In another, he's SHIKI and an uber-siscon.
In another, he's the ultimate loon, incapacitated physically, and he rapes readheads.
In other words, he's always a dark reflection of the protagonist: he takes what Shiki is already experiencing, magnifies and perverts it.