Teen Wolf: 10 Best Supporting Characters

10. Kate Argent 

Kate Argent (Jill Wagner) first appeared in season one, introduced as the brother of head hunter Chris Argent (JR Bourne) and one of the group's most unconventional and violent fighters. Throughout her first season arc, it becomes clear that Kate is hiding some devastating secrets, with a past full of murder and betrayal.

She is killed at the end of the first season, only to return at the very end of season three to become the show's main antagonist in season four. There, it's revealed she's been turned into a werejaguar, now more powerful than ever but just as psychotic.

Her arc slows down after season four, though she reappears in the final season, being hunted by her brother and her former love interest, Derek Hale (Tyler Hoechlin).

Violent, unhinged, broken and feeling constantly betrayed, she may not have been around for that long, but when she was she was bursting with charisma - and always promised to leave some mayhem in her wake.