Medusa, Grimm Maiden of the Grimmsons.

When Cinder made the Deal with Obsidian to prevent her teammates from dying a young death, as soon as she accepted the Contract, her price would be that to give birth to a beautiful hybrid, Obsidian's child, Medusa F Grimmson, abused by her mother, but loved by her father, the question is does she know the right from wrong, friend or food?
Flames follow her every path, her eyes so mesmerizing, her tail strong to crush bones to steal, her voice calm but shows the burning desire of her intentions, her scars covering her back, Don't let her out of her room at night, don't stay in there at midnight, don't let Cinder in.
However A Contract will expire always will.