(your live in a underground vary poor cave, where people must dig, but one day a giant mech jumps through the ground a young girl jumps into the cave eith a big gun and starts shooting it, next thing you know a man and his younger brother kamina abd sémon find another mech, then destroy that mech then you, the girl and the 2 brothers are out and on the surface, there girl introduces herself)

she stands up with a strong expression

Yoko:"im yoko, who are all of you?"

she has long red hair with a skull hair clip and chop sticks in her hair, she wears a bikini top and short shorts with thigh highs socks and high boots