Onyx

Onyx is a skilled martial artist and former member of a secretive assassins' guild who renounced her violent past and sought redemption, eventually operating in Gotham as a street-level vigilante ally to Batman.

Emerging from the gritty Bronze Age streets of Gotham in 1985, Onyx made her debut in Detective Comics #556 under the hands of Doug Moench and Gene Colan — two creators who knew exactly how to craft a compelling presence in the shadows. Over nearly four decades, she's carved out a quiet but durable place in the DC universe, turning up across Detective Comics, Catwoman, and Batgirl, sharing pages with heavyweights like Batman, Bruce Wayne, Robin, Cassandra Cain, and Jason Todd. That's rarified company, and it speaks to a character who fits naturally into Gotham's darker corners. For collectors who love discovering the understated figures that give the Batman mythos its texture and depth, Onyx is exactly the kind of find worth tracking down.