Topsy is originally from Blingdenstone in the Underdark. She was captured by the Drow while out gathering mushrooms in the tunnels near her home. Like most other Svirfneblin, Topsy has a stringy mop of hair. Topsy is by far more social than her brother.
Topsy hides the fact that she is a Wererat. Infected with the curse of lycanthropy, she hasn't entirely embraced it yet, and struggles to control her Wererat instincts and urges. She is fearful of what potential allies might do if they learn the truth, and is looking out for her brother and her own survival.