Derek.

Derek is an evolved werewolf, meaning he can shift into wolf form like this mother had, but he is not an alpha anymore.

He left Beacon Hills, but remained loyal and affiliated with Scott’s pack.

His last romantic interest was Braeden. They opted to go their separate ways due to their lives taking them in different directions. They ended things amicably and he has been single ever since.

In his time away, Derek went to be with his younger sister, Cora.