Like all of the Beorns back in the day, she lived on the peaceful island, Beorn Island. Xerra however wasn't one to make friends and often spend her time in other parts of the island. She did have contacts however, and did care for her fellow Beorns. When the fire burned Beorn Island and killed all of them, she was furious. She was set out to seek the culprit and put an end to their life.
Xerra can be described as a lone-wolf. She prefers to be on her own, and doesn't really do chit chat. She is quite rude and can come across as aggressive, but mainly to people who she doesn't trust, or she just emit a bad aura. She has trust issues, and really must be convinced with facts and proof, else she won't believe anything. She blames herself for letting Beorn Island burn to the ground, and sees it as her job to kill the culprit.
Not unlike many Beorns, Xerra is a fighter and a survivor. She somehow always is able to provide herself with the things she needs to survive, it being food, shelter or other things. She holds up quite well in a fisticuffs battle, and proves to be a decent sword fighter, despite having not much experience with it.