Lydia Martin has a major role in Teen Wolf. She is highly intelligent and elegant, along with the fact that she's one of the popular students at Beacon Hills High School.

Her paternal grandmother, Lorraine, was a banshee who never knew about her abilities which lead everyone to believe she was insane, but her and Lydia appeared to have a close relationship. Lydia has developed quite a bit since she met Allison Argent, Scott McCall, and Stiles Stilinski. Lydia was manipulative with her friends, using them whenever it suited her ambitions. She was, on the surface at least, shallow and spoiled but this turned out to be an elaborate act to hide the fact that she possesses a genius level IQ. She is well versed in chemistry and understands both classical and archaic Latin.

Lydia's status in Teen Wolf is "Banshee"- watch the series to find out more about that...

 

She's portrayed by 'Holland Roden'!