Derek Hale

Derek was born as the second child of the Alpha of the Hale Family, Talia Hale in Beacon Hills.

He had an older sister Laura and his younger sister Cora was born five years after him. 

In his Teenage Years Derek had a relationship with werewolf hunter Kate Argent.

She used him to get information on his family to set the fire at Hale House that killed most of his family.

This is why Derek is an “lone wolf” and has problems to trust people.

After killing his uncle and take his Alpha status he build a pack by turning teenagers like Isaac and Jackson into werewolves. 

Later Derek gaves up the spark that made him an Alpha. His eyes turned from red back to blue.