Stydia

Stydia, is the name of the relationship between human, Stiles Stilinski and Banshee, Lydia Martin.

Canon
Stiles had developed a crush on Lydia as early as the third grade, but Lydia, who was in a long-term relationship with Jackson Whittemore, didn't notice or acknowledge Stiles' existence until they were sophomores in high school.

But when the supernatural world began to affect the lives of Stiles, Lydia, and the rest of their friends they start to be friends.

They kissed for first time in 3x11 when Stiles had a panic attack and Lydia kissed him to stop it.

In the first episode of season 6, Memory Lost, Stiles finally admitted to Lydia that he loves her before he was taken by the Ghost Riders and erased from her memory.

When Lydia remember and rescue him from Ghost Riders, she said that she never said I love you and he answered that she didn't have to. Then, they kissed and start a relationship.