★Japanese Voice Actor: Shingo Kato
★English Voice Actor: Ben Diskin
★German Voice Actor: Rainer Fritzsche
★Spanish (LA) Voice Actor: Julio Bernal
★Spanish (EUR) Voice Actor: Jorge Saudinós
★French Voice Actor: Vincent Dussaiwoir
★Portuguese (BRZ) Voice Actor: Diego Marques
Haida's appearance is based off the Spotted Hyena and his name is a play off the Japanese pronunciation of 'Hyena'. Haida has brown fur, with a black muzzle and ears, black freckle-like spots on his cheeks, gray hands, tail and fur tufts in his ears, and a pronounced under bite. At work, Haida wears a white dress shirt, red tie, black dress pants, and brown dress shoes. His causal wear consists of a red and black striped t-shirt, black leather jacket, jeans, and boots.
It's hard to say what Haida's real personality is like because most of his time is spent fawning over Retsuko or drunk. Haida tries really hard to impress Retsuko with his initiative to fix her things and compliments her as best he can, but he cannot get himself to admit his feelings for her. He has a lot of trust for Fenneko to keep Retsuko safe at the mixer, and though he gets extremely jealous of Resasuke, Haida is still content that Retsuko is happy with him. This shows that he's kind and considerate, even if he's not getting what he wants.
According to Aggretsuko writer and director, Rarecho, Haida plays bass guitar and loves to sing punk rock but is really bad at it.
★Haida's bass guitar is modeled after a Fender Jazz Bass.
★Haida is voiced by Ben Diskin, who is known for voicing Numbah One from Codename: Kids Next Door.
★ "I want to punch him."
★ "Could I be more pathetic?"
★ "I hope I never piss you off"
★ "Is it true that you gave birth the other day?!"