Known in the Underground most famously (and topside less so) as the bassist for a band called Devil's Advocate. Fairly well known, but not quite launched to stardom, her band occasionally plays Topside as well for humans and the like. She never stays in one place for too long.

When not touring the Underround, she can often be found at the nightclub Abbadon, flirting with one of their bouncers and bartenders.

Although Ksenia has a baseline appearance, she is a shapeshifter by nature, and as such aspects of her appearance are always liable to change. Most commonly she is a pseudodemon with dark purple skin and even darker hair that is worn in a high ponytail. Markings of fuschia and cyan run down the front of her body and her shoulders. She has furry, almost animalistic ears on the side of her head, and two curved horns atop her head, gradiant from the purple of her skin to fuschia at the tips. Her hands are clawed, making for easy picks for her bass, and her feet are digigrade and resemble paws. A long, prehensile tail extends from the small of her back, almost as long as she is tall.

Her eyes are perhaps the most striking part of her: yellow sclera, with fuschia irises and cyan pupils. She is capable of making the markings on her body glow softly, and tends to wear dark, somewhat revealing and ripped clothing. Her build is svelte and moderately curvy.

She has an air about her that seems effortlessly laidback, almost alluring. Ksenia is a naturally curious individual, wanting to get to know those around her and seeing what makes them sweat. She flirts easily with those who she finds attractive, and can always find a way to have a good time.

Much of Ksenia's history is still shrouded in mystery. It's clear Rin and her have had a past prior to her fame; potentially even dating back to their childhood. They seemed to have drifted apart sometime after she began touring, dropping in and out of his life every so often. They remain close, by a melancholy is there if one looks deep enough.

-She co-writes a lot of the music for Devil's Advocate, although she's fairly humble about it.

-Ksenia cannot read formal sheet music- she remembers the sets strictly through remembering and from sound recall.

-Ksenia is fairly casual about sex and sees it as good stress relief.

-She's mostly a social drinker, otherwise not really turning towards alcohol to have a good time.