I must confess, I have a crazy imagination or obsessed fantasy of myself/my OC with other OCs working together in the same fandom and mentally create roles and archetypes for them.  
Bit early but for example here:
 
Delusional Desires:  
Intelligent maniacal schemer, the odd-ball of the group, and secretly have special powers or knowledge from another world.  
Physically fast but low stamina.  
Favorite subject: History and Reading.
 
Sketchy the Greaser:  
The big tough guy of the group and a violent-minded brute.  
Strongest guy in the group with medium stamina.  
Favorite subject: Automobile Mechanic.
 
Crimson “Crimsy” Sunset:  
Gentle and happy girl.  
Have huge stamina.  
Favorite subject: Art.
 
I don’t have a better name, I call them the Nothing-Better-To-Do Club.
 
Story:  
Founded in Canterlot High School by Delusional Desires and Sketchy and Crimson “Crismy” Sunset joined in. In the canon Equestria Girls storyline, the club was found over a month after Sunset Shimmer incident during the Fall Formal Dance but before the Battle of the Band with The Dazzlings/Sirens. Although they don’t have a solid friendship among themselves and neither Sketchy or Crimsy have reason to stay other play along Delusional’s crazy random schemes, in fact, Delusional often drag them into his crazy adventures. The two members sometimes willful participate when the club motive suits them and they do get benefits in the club: helping each others homework, making money for school fundraisers or for profit, and sometimes whenever Delusional Desires is making brunch, Sketchy and Crimsy would come over to get a free fancy meal; Delusional can cook fancy dishes.
 
 
What does the Nothing-Better-To-Do Club do? Hence it’s name, half of the time, they just sat in their club room doing nothing except reading, homework, experiments, and even video games. The other half of the time, usually Delusional Desires come up with a random plans from normal or adventurous which are also hence “nothing better to do”:  
Helping Out Fellow Students  
Fundraising  
Cooking Contest  
Mystery Solving  
Bully Prevention  
School Group Fights  
Fighting Monsters  
Extra-Dimensional Travel  
And lots more.
 
The idea for this club come from other groups that I saw from shows, anime, and video games: My Little Pony: Friendship is Magic (with the Cutie Mark Crusaders), Ed, Edd, n Eddy, The Melancholy of Haruhi Suzumiya (The S.O.S. Brigade), and The Ouran High School Host Club (club hence its name), Bully (the video game).