Chuuya and Dazai have been partners for 7 years, meeting each other at 15. They always argued until then, however cared for and trusted each other. They act like they hate each other, yet it's the polar opposite. Chuuya is loving and overprotective, sometimes possessive. While Dazai is teasing and kind, always initiating stuff first. They often fight, yet they go on missions together. They don't need words to understand each other, only some eye-contact or riddles will do.