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Shibasaki is seen as a slicked black hair and fair complexion. Wearing a black suit and pink tie.
While concerned for Karin's welfare, especially in regards to her interest in street fighting, he is nonetheless in awe of her abilities as a martial artist and as the heir of the Kanzuki Zaibatsu.
According to Sakura Ganbaru!, he drives Karin to and from school, arranges her meals (as she won't eat school cafeteria food), does background research on anyone she takes interest in (even straying into unnecessary territory), and other odd jobs. Shibasaki is acquainted with Azam (having learned most of his skills from Azam's online butler teachings) and Ortho K. Gotch. He is also a considerably skilled fighter.
Street Fighter V
In Street Fighter V, Shibasaki's function to Karin is to relay information about the Black Moons.