Official Concept Art of Yatsuki. Source
Ya, 矢 = Arrow (can be combined with the game title name to Yajirushi 矢印, lit. Arrow Sign)
Yatsuki (やつき) is the protagonist of the game Shirushi (印) by TaSK. He stays in a room that has a broken television.
He has grey hair and blue eyes, he wears a white sleeves black shirt with a yellow right arrow sign on his chest, blue trousers and brown shoes.
Not much is known about Yatsuki's personality.
Not much is known of Yatsuki's past.