Beast #1 that cries "gugu" and "gaga." An individual who used to be the leader of Guest's team. His name as a human was Shinjo. Apparently, he was a former ace. He talks to himself a lot. His gender as a human was male. When Guest returned from lunch break, he had become a Gugu-Gaga. He seems to have memories of his time as a human, but since he cannot speak human language, it is hard to understand what he is saying.

Beast #2 that cries "gugu" and "gaga." An individual who was a member of Guest's team. Her name as a human was Tanoue. A former shut-in. Self-proclaimed sickly. Her gender as a human was female. When Guest returned from lunch break, she had become a Gugu-Gaga. She seems to have memories of her time as a human, but since she cannot speak human language, it is hard to understand what she is saying.

A member of the same team as Guest. The office veteran type. She loves gossip and cute things. She vaguely suspects that the two have turned into Gugu-Gagas, but she has no proof.