When she was Human, she was an asian-american art student who got a bit too drunk and brash after what she bravely assumed was an interview-gone-well. She was easily convinced to come along to the island, up until the point where she sobered up slightly, which is when the crew knocked her out. She had dull brown eyes, and was a bit too brave for her own good.
Upon completing her first Drive Kill, she was turned into a Kittymorph, and left without memory of her previous life or friends. As a Kittymorph, her personality became more energetic and flirty. Notably, her human body simply had dull brown eyes, while her Kittymorph body gained a few flecks of green...
After her second Drive Kill, she returned with the form of a Zombie, her skin taking a grey pallor and her normally black hair starting to grey around the scalp. Her skin did show signs of rot, but not to any noticeably terrifying extent, and what did decay she ensured was clean enough not to smell. Once again, she lost her memory of the friends she made over time, and her personality became more wizened and patient. Her Zombie form retained those same dull brown eyes, though there were several vivid flecks of green...
With her third Drive Kill, she was turned back into a Kittymorph, with a similarly flirty (and subtly bloodthirsty) personality fitting of the race. This time, though, her fur was a lighter shade of grey, and her eyes were dull-ish brown with many streaks of light green. Something is clearly changing from having been transformed by improbability so often.
Upon destroying the Drive for the fourth time, she became a Squat, incredibly brash and willing to challenge anything that looks at her funny. Aside from being shorter and, well, squatter than normal, she looked relatively close to how she did as a human, if slightly more masculine. Her originally brown eyes were then a little more than half green, and what parts remained brown were no longer dull.
After her fifth Drive Kill, she took the form of a particularly strange Mutant. She became comprised mostly of a thick, green slime, which had a tendency to drip and trail wherever she moved. While she had limited control over the vague shape of her still-humanoid form, she still possessed three relatively large eyes - two of which were bright green, and almost glowing, while the third, placed at the center of her forehead, remained a slightly shimmering brown. Whatever process has been affecting her over the course of the past few transformations seems to be nearly completed at this point. Being in her new form has also influenced her personality slightly, making her speech patterns ever-so-slightly more somber and flowery.
Her sixth drive kill placed her back in the body of a Kittymorph. with few changes since her last bout as one, except for the fact that her irises were then solidly green and seem to glow in the dark. Aside from this, she remained the signature Kittymorph combination of flirty and surprisingly bloodthirsty. Notably, though, she seemed to be starting to resist the effects of the amnesic used when a contestant defeats the drive.
Following her seventh and eighth Drive Kill, she took the form of a Robot, made of metal and glass. Her glass coverings of her chassis revealed intricate, polished steel clockwork inside, though the general shape of her body was unchanged, with one exception. Rather than a proper head, she had a stripped monochrome CRT monitor, using green phosphor for its coloration. This doubled as her main weapon, the monitor being able to fire a directed pulse laser for combat.
Post-ninth DK, she once again became a Kittymorph, mostly similar to her previous appearance and personality as before, except for the fact that her green eyes definitely glowed bright in the darkness, and seemed a bit dialated constantly.
After her tenth success, she returned to her robotic appearance. Her screen, however, glowed ever-brighter, and she gained a strange pressure-gauge at the center of her back, looking more like an ornate clock. It seemed to go from grey to green, with the needle mere centimeters from the maximum value.
Her eleventh success pushed the needle to the maximum value. The gauges glass cover has shattered, and the green bar seemed to glow. Her screen was solidly green. She became mute, and green sparks emanated from her chassis with each movement, leaving each motion showered with the sparks.
Her twelfth drive kill overwhelmed her with the drive's improbability, warping her to something no longer even derivative of human. She became a Joker, with brilliant, green eyes and an uncanny, almost perpetual grin. She wore a dark green tuxedo, with jade dice as her primary weapon and method of entertainment. The dice seemed to catch the light of the sun from all angles - even when deprived of the sun required to do so.