Tentacle

A plant type monster endowed with a countless number of slippery tentacles. Originally they weren't monsters, instead they were grotesque plants known as "tentacle plants" that grow in clusters in the demon realm, but after building up demonic energy while continuing to enviously observe the sight of monsters having sex with human men, they became monsters. Before becoming monsters, they were tentacle plant leaders possessing high intelligence, so they can communicate with and manipulate the tentacle plants around them.