I also have a Splatoon OC who I made after getting really into the game. She's my Splatoon mascot who I feature in Splatfest artwork and in-game posts most of the time. Some background on her:

Naudia is a EDM DJ who goes by the stage name Tidenaut. She lives in the Splatlands and is thus a huge fan of and is acuented with Deep Cut, her favorite is Bigman. She regularly frequents Hotlantis just so she can see Harmony who she admires and has a crush on. Whenever there's a Splatfest, she lives to set up a photoshoot for the team she supports whenever she or Deepcut and anyone else involved are free (that is what the pictures I draw are.)