The unnamed Hammer Girl (portrayed by Indonesian actress Julie Estelle) is a deaf-mute henchwoman who is armed with two hammers.
She is known to be extremely dangerous as she took down an entire train full of Mafia who were only armed with knives.
Towards the final part, she got killed along her brother "Baseball Bat Man" by the hero of the film, Rama, who uses her hammer and slashes her neck open, instantly killing her.
Video:
https://www.youtube.com/watch?v=SHt6sYe9w9M
The Raid 2 Rama Vs. Hammer Girl & Baseball Bat Man Fight Scene HD-0