Starfire (Starfire #1)

Elora Verras has been killing under the alias of the Red Threat for four years, until the day her brother is kidnapped.
Celeste Fuoco is the daughter of a war general, and has always been given the best a girl can get. But when her family is assassinated during their annual ball, her and her brother the only survivors. But the longer that Celeste stays out in the open, her mind feels like it is ripping apart, and she is terrified of what will happen when it does.
Hara was born to protect her best friend and princess, Maya. But when she is betrayed by the person closest to her, she flees the place where she had always lived.
Araelya Brighton has a secret, and she seems to know when things are going to happen far before it does. When she runs into Elora, everything begins to fall into place.
Four girls, all with abilities of their own must push aside their pasts and differences to rebirth the only power known to stop a vengeful tyrant.