Alright enough messing around.

Thany has a special ability then whenever her heart is attacked, well let's say it is not pretty. No, not like getting your heart broken, literally the heart physically. She can use her knife to strike her own heart and the following would occur:

1: The knife turns into a powerful sword
2: Flames engulf the target
3: An ally target gets their wounds healed

However the above actions can tire her out so she ofter carries a pistol with her. She's actually an impressive marksman.