Kazutora Hanemiya/Relationships

Manjiro Sano
Kazutora and Mikey used to be close friends. Knowing Mikey's bike was old and slow, Kazutora wanted to get him a new one, albeit with extremely questionable means. He ended up killing Mikey's brother. Due to his mental illness caused by childhood trauma, he placed the blame for his actions entirely on Mikey and developed an irrational hate for him.

After Mikey spared him and realizing that Baji died, Kazutora was overcome with grief. He came to his senses and acknowledged his delusions. He rightly chose to stay behind and take the blame for Baji's death

Keisuke Baji
Baji and Kazutora are childhood friend.

Chifuyu Matsuno
After Kazutora was released from prison after 10 years, Chifuyu welcomed him as an employee in his pet store, as both were extremely close with Baji.