Tenka Koganei  

, 虎金井 天下

Tenka is an assassin from the tiger family of the twelve Zodiac Masters who initially comes to kill Kōshi. Due to his background as a tiger, he possesses traits similar to those of a feline such as being afraid of water and enjoying playing with spherical objects. He carries a soccer ball named "Becky" that talks to him, which has been communicating with him since childhood. As they grew up together, Tenka developed feelings for Momoko after defeating her in a training match when they were children and agreeing to meet again later. However, upon meeting again as adults, Momoko revealed her intention to have a fatal battle with Tenka rather than marry him as he had assumed.