Esmerelda dueled on Solaris VII, but did not achieve real success until lance-on-lance dueling became popular. She met Jeremiah Rose in 3054 when he talked himself into a lance-on-lance duel between Warwick Stables and Carstairs Stables, the stable Esmerelda worked for. After the successful conclusion of that duel, Esmerelda and stablemate Badicus O'Shea joined Rose's nascent mercenary unit.
On Solaris, Esmerelda piloted a -7M Warhammer. She took her BattleMech with her when she left Solaris to join the Black Thorns. Following the Black Thorns' campaign on Borghese, she piloted a salvaged Mad Cat.
- The Black Thorns, p. 12
- The Black Thorns, pp. 24-25