He's one of the most troublesome ghouls of the 20th ward to the point where even some ghouls wouldn't get involved with him. He is known as the "Gourmet" by investigators and is one of the most difficult ghouls to capture, specially because he hails from a powerful and rich family of ghouls with connections in the government. He is a part of the "Ghoul Restaurant" under the alias MM. He is a very powerful, cunning, smug, and fashionable ghoul and was also an acquaintance of Rize. Like both Ken and Rize he is an avid reader. He sometimes says words or phrases in either English, Spanish, French or Italian and develops an obsession for Ken, because of his seemingly unique quality of being human and ghoul. He is very athletic and proficient in martial arts. After being apart of Kaneki's team post-Aogiri he considers himself Kaneki's best friend, whether he still sees Kaneki as food or really views him as a friend is not clear. After the time-skip, Shū gets devastated with Kaneki's disappearance until he is informed of his new identity as Haise and starts conspiring to have him remember his past, until his family's secret is exposed and his entire clan is put on the CCG's hit list.