This is Lady 8, the mafia boss of The Billiard Boys

One of 17 expys initially based on The Felt(homestuck) that were plopped into our dnd campaign (among other imported nonsense in our game)

(8, like Vincent being Caine’s, is also one of the characters I play)

Lady 8, a name not confidently whispered among outsiders. For many familiar with the billiard boys, she is recognized as the mysterious shadowy leader that she is, but that’s as far as most common knowledge usually goes.

She rarely speaks to those coming to the bar for jobs, in fact, most outsiders never see her at all. Though, if you visit the bar at the right time, at the right night, those may be lucky enough to hear her sing.

Unbeknownst to most, 8 is one of the most powerful wizards still alive, even capable of casting 9th level and creating spells of her own. She is the first, and technically last, dunamancer.

She is also the wielder of the yellow zillifact, the Cue Staff. A magical pool stick with an orb at the end of it equivalent to a tiny sphere of annihilation when in use.

Among her abilities and items, the one that trumps them all is the reason she is a heavily protected secret. Her connection to this universe. With her blood, she can give life. With her death, the universe dies.

A warning to even the most powerful enemies, and a secret kept from the most insane and selfish. The lifeblood of the universe pulses within Lady 8, and the death of the heartless mafia boss marks the end.