Sibylle

She's very harsh and kind of a brat. She's very prideful and quick to annoy people.
She's a strong willed fighter, that would do anything to protect the few she loves.

Merudians in this tabletop is a race that is also called "the descendants of Medusa" although that name comes from human. Strong meridians are able to manipulate their hair like other... multiple pair of arms. Their eyes are black and hair can be any pastel color.
They all have to go through a very painful 1 year adolescence around 13 y.o in which their power (to be able to put anyone to sleep if they look into their eyes) awaken.

Sibylle and her twin, Aquilegya are orphans and grew up in the street. They quickly became "cats" (basically information gatherer and/or thieves) for the local gang.
The inter-universal protection fleet stepped in the local governement and gathered lost children like our sisters to give them education, a roof and food.

An interesting note : twins in that universe are able to telepathically comunicate and exchange body if needed.