Alex

"Ok, now it should play in B sharp" - Alex (Episode 5)

Alex is part of the main 6 of JRmysteries in season 1. He claims that he is able to tune a bass guitar into B#, but it is never confirmed whether or not it is true. He is considered by many to be the edgy character of the bunch. In episode 10, he learns that he is being recorded and uploaded to YouTube. Alex also is a part of the "JR band" which consists of Justin, Kevin, Chris, and of course, Alex. In episode 17, when Justin, Kevin and Jackson go to the Lick School of Playing the Lick to get him back into JRmysteries, he takes over Big Kyle's spot as the principal of the school.

While not appearing in many episodes, he is still considered a protagonist because he is part of the main 6.