True Alpha

A True Alpha is a werewolf who becomes an Alpha solely by strength of character and will. True Alphas are rare, appearing once in a 100 years.

 

A werewolf cannot rise to this status if they've ever killed someone as discussed by Scott and Ms. Morrell in The Girl Who Knew Too Much.

 

In Smoke and Mirrors, Peter relays a True Alpha's status cannot be stolen were they be slain as in the manner of a regular Alpha. Furthermore, Deaton says in Parasomnia the power of a True Alpha cannot be absorbed or siphoned by any other creature - except for a Beta of said True Alpha's making.

 

During Season 3, Scott's eyes, in a number of situations of high duress and immense determination, briefly turn Alpha red. In Currents, Deaton confirms Scott has the potential to be a True Alpha. In Lunar Ellipse, Scott fully attains the status of Alpha by determinedly pushing through a mountain ash barrier, breaking it, awakening his True Alpha status.