Ten was presumably initiated into her life of crime at an early age, seeing as she had no friends and was constantly "uproot[ed] every few weeks". She eventually grew weary of her lifestyle, becoming the only malcontent member of the gang. Ten played a vital role in the team, as she was in charge of overriding the security systems of the places they robbed. Melanie was notably less cold-blooded and ruthless than her father and was much more humane; she seemed gentle, empathetic, smart, level-headed, honorable, somewhat outspoken, reliable, and trustworthy enough. On her first night in Gotham City
, Melanie went to Juice Bar, but didn't go in because she didn't know anybody.
She observed Terry McGinnis
and Dana Tan
's spat from outside, and when he got out, she approached him, and the two bonded. While Terry complained about his undisclosed "after school" with Bruce Wayne
, Melanie noted how tiresome her itinerant life was. She also observed a parallel between her and Terry, and expressed her infatuation by platting a kiss on his lips. However, Terry wasn't too eager in going so fast, so the two arranged a date on the next night, on the same place. Much to her dissatisfaction, the Royal Flush Gang had planned to rob a museum that night. Therefore, Ten wasn't completely focused on her task, which resulted in her not disabling the alarms properly. Shortly after they broke in, they were surprised by gunmen.