Bunko Amano

Bunko Amano (文庫天野, Amano Bunko) is a Taishoku Kokumin, the younger sister of Hanzo Amano, who works as a waitress at her brother's Coffee Shop.

Trivia

 * Bunko's appearance is based off Namanie Nienami from Medaka Box.
 * The way Han refers to Han as "Bu-nee" is a pun for "bunny", as it sounds very similar to the English word even when spoken in Japanese.
 * When taking the two first letters of the two siblings' given names, what is given is "HB" which is one of the author's most common nicknames, though it was unintentional.