She has to be no older than 10 and she killed a bunch of grown men with her bare-hands.
Girl is an adorable monster.
You'd be surprised on how easy it is to kill people with right implements...even as a kid and by accident. Easiest example I can shoot off the top of my head is stabbing diagonally up from waist-high, which, depends on the angle will hit either kidney, liver and gallblader, or lungs and heart. Kick them behind the knees, and when they fell stab them on the neck.
With how human anatomy works, the shorter you are, the EASIER you can cause damage to the opponent, given the organs in the abdominal area aren't protected by ribcage. Being a kid is like having a 'free low blow' perk 24/7.