Y

Y-Series Prototype 1, commonly shortened to Y was a public service android created by Domino Labs on another Earth. She, along with her 'sisters' Z and J, were members of the Black Mark's first incarnation before its subsequent reforming in 2198, later joining its second incarnation until its dissolution in early 2217. She later took up a post as the receptionist for the Richard H. Bupkis Center for Cloning and Human Research.

Appearance and Personality
Y appeared as a humanoid robot with pale skin, pink hair, and pink eyes. Her body was a cascading series of fans, CPU's, and other machinery that kept her alive. She was equipped with "emergency combat capabilities", which she never utilized.

Y was a pacifist who disdained combat, and was primarily built to work with people rather than against them.

Background
As stated earlier, Y was built primarily to work in the public sector, in jobs where interacting with people would be necessary. However, she was a prototype, meant to test out the initial code and emergent A.I. systems made by her creator, whose name and identity have been lost to time. She joined the Black Mark during their quest for the weak point of the universe located on another Earth. She, along with her sister units Z and J, bore witness to the sad fate of the Earth that Carmine originally hailed from: a decaying, calcified husk.

The Be-All and End-All
Y expressed dismay as Galamoth was seemingly killed before her eyes. She later called Carmine to inform them that she had been held hostage at the Mt. Lynch Weather Research Lab by Banquo, leading the group to confront the latter.

He Who Fights Monsters
Y was present at the castle when Saiph seemingly went berserk at the hands of the red mist.

Living in a Box
Y participated in the Killing City Life, held by Rosencrantz and Guildenstern

Overture pt. 1
The 21st Unit encountered Y working at the front desk of the Richard H. Bupkis Center, where she happily greeted them.