Emma and her adopted sister Noname (No-NOM-ay).
Noname is a cyborg girl with transforming insect limbs, frickin' lasers, and a love for her big sister Emma.

I've always had the idea for Emma to have a little sister.
One who had a different set of abilities and acted as a bit of a foil to Emma.
Where as Emma is more chill and would rather use her powers for mundane stuff,
Noname would eagerly use her powers to help others and fight, though she does have a bit of a bloodlust. :P