Tetsu Asahina

Tetsu Asahina (朝比奈 鉄 Asahina Tetsu) is the owner of Cafe Tet-chan and an alumnus of Himaraya Third Techinal School. Prior to being a proprietor and opening his own restaurant, Testu was a teacher at Himaraya Third Technical High School and was the advisor for the automotive club, which Shirogane was the president of during his time at school.

Etymology

 * The name Tetsu means "iron" (鉄).
 * Tetsu's surname Asahina means "morning" (朝) (asa), "ratio, proportion" (比) (hi) and "apple tree" (奈) (na).