Shelby Marcus

Shelby Marcus[1] is one of the main protagonists of Best Friends Whenever. Shelby is Cyd's best friend and the two girls live together in Shelby's house, due to Cyd's parents leaving for Peru. Shelby and Cyd discover their power to time travel together by messing around with a science machine. Shelby is a girly, quirky, cheerful, and intelligent young teen. She always likes to keep it safe, and is always struggling to keep her and Cyd out of trouble.

Shelby is portrayed by Lauren Taylor.

Personality
Shelby is kind, cheerful, sassy, and a bit girly. She is smart and she thinks ahead all the time, however she can be a bit naïve. She is very positive and wants the best for everyone. Shelby is a genuinely kind hearted person, to the point where she feels guilty at being unkind to even honestly unpleasant people, such as The Rob. Shelby tends to be a little high strung but she is determined and a kind person.

Cyd Ripley (best friend/act like sisters)
Shelby and Cyd have known each other since kindergarten and have experienced many things on their way. The two girls are best friends and do everything together. After an experiment gone terribly wrong, the two girls use the power for mostly everything.

Barry Eisenberg (close friends/neighbor)
Barry and Shelby are close friends.

Naldo Montoya (close friends)
Naldo and Shelby are close friends.