Originally [[akai haato|Haato's]] in-universe boyfriend, he was killed off shortly after his introduction in 2018. In early 2021, he was brought back proper as a side-character. Nowadays, he essentially acts as a [[genderswap|genderswapped]] male version of Akai Haato.

h4. See also
* "Red-kun's origin story":[https://www.youtube.com/watch?v=HhF4hS36q6g]
red-kun (akai haato)