Kylan (Black Hair), Kian (Blonde Hair), Xaiver (brown hair), and Dylan (light brown hair), and him were all best friends from Kindergarten until Middle School Graduation. Now they were Freshmen in High School... 

Kylan - He's quite the introvert, and he's known for his smartness and his skills in the viola. 
Kian - He's a total extravert, his biggest fear is being alone. His happiness is a facade tho.
Xaiver - Is the group's playboy. Very Handsome!
Dylan - Innocent mamas boy. Likes cuddles!