A Former servant to the Vance family who entered the tournament to get revenge, but relies on her tentacle-raping staff to do most of the fighting.
Nyx was treated horribly by Elina Vance, obviously the reson why she wants revenge. Nyx's main problem though, is that she has a very submissive personality. In true honesty the only real reason that Nyx can compete at all is due to the power that of her evil sentinet staff Funikura. Funikura grants Nyx with immeasurable magical powers, although at a rather steep price. Funikura will start to rape her if she starts to act weak in any way (which was a rather stupid move on him, picking a host like her). Nyx is actually still SO terrified of Elina that she still almost automatically follows Elina's orders, which prompts another tentacle rape by Funikura (that happens a LOT if you haven't gotten the message yet).
After Nyx loses to Elina she supports herself by getting a job as a tavern girl, back to what she's good at right? When she eventually retrieves Funikura, he is not pleased with what Nyx had been doing and begins tentacle raping her again.