Taro Yamada

Senpai is the Yandere-chan's fiancé. His real name is Taro Yamada.

About
He is a third-year student at Akademi High School. The classroom he's in is Class Purple, or Class 3-2. His classmates are Riku Soma, Kokona Haruka and Yumi Matsuda.

He has wrote a book called " How to Hentai without Hentaing."

Fanon Relationships
He is one of Kaori Kitamura's many crushes. Ishimaru Tomohisa considers Senpai to be his enemy. Matoaka Amonute has an extreme hatred for Senpai, although her reasons are unknown.

Yuki Suishou held a grudge against him for being so oblivious to Yandere-chan's crush, prior to Yan-chan confessing her love to Senpai. (Yuki herself used to be in love with Yandere-chan. She still retains a small amount of some of these feelings for Yandere-chan, and the small amount of feelings she had left for her were the reason Yuki became a Puella Magi).

Senpai has a younger sister named Hanako. He also has two children with Yandere-chan in the future, Miraiko and Himeno.

Trivia

 * He acts like a yandere when someone hurts his little sister.
 * Along with this, he has "Big Brother" senses that only occur when Kohai is in trouble, similar to how Yandere-chan has Yandere Vision.
 * In the Soul Eater RP, it's revealed that he has inherited the (fluctuating) gene that makes him a demon weapon. His weapon form is a knife.
 * The reason he is a knife is because "His weapon form is as lame as his persona."