Non-consensual Sex with Tentacles

The character suffers non-consensual sex with tentacles. Demon tails and whatnot are also covered by this trait.

A tentacle is a flexible, mobile, elongated organ present in some species of animals, most of them invertebrates.

Tentacle rape or shokushu goukan is a concept found in some horror hentai titles, where various tentacled creatures (usually fictional monsters) rape or otherwise penetrate women, anthropomorphous creatures, Futanari and, less commonly, men.