Killian Walker

Killian Sliver Walker (December 13, 1988) is the biological son of Raven Pierce and Gerard Argent, the adoptive son of Vivienne Walker. He is the twin brother of Aurora Pierce, the younger half-brother of Chris Argent and Kate Argent the older half-brother of Lila Pierce.. He is the uncle of Talia, Bexley, Declan, Emery, and Clarke Hale, and Raven Parrish.

Biography
He was born in Beacon Hills a few minutes after his twin sister, their birth caused an earthquake due to their power. Raven sent Killian with her own twin sister, Vivienne. The two believed that Killian absorbed most the dark magic like Vivienne did.

His adoptive father, Lucius wanted to sacrifice Killian for a ritual for more power so Vivienne ran away with him.

As Killian's powers developed Vivienne quickly realized that he didn't absorb most of the dark magic as the sisters believed. Killian became very adapted to dark magic.

At eighteen, he came back to learn light magic from his Aunt. He spent the summer with her and had a run in with Derek Hale, which sparked a dislike between the two that lasted into adulthood.

Killian didn't learn of his true heritage until September of 2011 when Aurora gave birth to Declan and it caused an earthquake and all witches in america could feel the power of it.

Vivienne showed up at the hospital and Killian told her that she wasn't allowed by the baby. The doctor informed them that none of her half-siblings was a match to Aurora's blood type and she need blood. Vivienne told Killian to try and he argued that if none of her siblings match, he problem wouldn't and they doctor agreed. Vivienne told him that he wasn't Aurora's cousin, that they was twins. Killian argued that wasn't possible, he was nearly a year older and she told him that he was indeed her twin brother. The doctor told him that trying couldn't hurt.

Killian was a match for Aurora and donated blood to help her. He found his mother and demanded she tell him what was going on.