Mucusance

Mucusance is a green tentacle monster from Oishi High School Battle and Oishi's boyfriend. It is suggested that his entire race is dying since, according to Oishi, if they do not wed, his race will cease to exist.

In Teen Pregnancy, Oishi broke up with him after she gave birth.

Biography
Mucusance only made 6 appearances: 4 times in Oishi High School Battle and twice in Oishi Origins.

As of season 2, Mucusance also seems to be a student at the school as well, since Ms. Hooper refers to him by name in Homecoming Dance.