Blur: A_Emotionless_Squid
(Jeno's and Erā's fault)

Erā: Glitchy_Wolf
(So people could tell it was him)

Yume: Starry_Eyed
(Duh)

Kurosu: Red_X
(First thing that came to his head)

Aoiberī: Berry_Blue
(Hokori's fault)

Hokori: Dusty_Boi
(Aoiberī's fault)

Akumu: Hiss_Hiss_Ima_Cat
(Everyone says she/he acts like a cat)

Kirā: Meow_Meow
(Favorite animal is a cat)

Jeno: Im_Anti-Social
(Blur's fault)

Shinigami: I_🖤_Coffee
('Cause he does)

Horā: Akumu_Quit_Frickn_Stealing_My_Veggatables'_Soil
(And eating it)

Yokubō: Kōshokuna_Wolf
(Search "Lustful" in Japanese on Google Translate)