Shingen Kishitani
A man with an eccentric personality who is Shinra’s father. His behaviour is odd to the point that he wears a Gas Mask, he says: “Tokyo air is very filthy.” and that’s the reason why he wears it. He has also a habit of spinning a pen in his right hand.
While his personality ranges from childish for comic relief up to a somewhat intimidating one(especially around Izaya and Namie), he is the one who offered Celty a home to stay, in exchange for performing surgery on her, to which she agreed. He is in fact the one who made Shinra participate in multiple dissections, which he believes are the reason why Shinra is so twisted now.
It is revealed that he is the one who stole Celty’s head using the cursed blade Saika to cut the soul that binds together head and body. After that he sold the sword to an acquaintance while handing over Celty’s head to Namie’s father.