Topaz, real name Jelena,[1] and Numby are a playable character in Honkai: Star Rail.

Topaz is a Senior Manager of the Strategic Investment Department in the Interastral Peace Corporation, one of the Ten Stonehearts, and leader of the Special Debts Picket Team. Her Cornerstone is the "Topaz of Debt Retrieval."

Topaz's partner, the Warp Trotter "Numby," is also capable of acutely perceiving where "riches" are located. It can even perform jobs involving security, debt collection, and actuarial sciences