It's somehow yokai characters as Camp Camp characters. I got this idea from LogantheCrazy123's are the characters base on Logan's book

David- Logan
Gwen- Mia(eeveelover99976 )
Max- U.F Shock
Nikki- Scarlace
Neil- Flirtcy
Space Kid- USApyon
Dolph- Rontao(DWN024ShadowMan )
Nurf- Bellhop
Preston- Lieler
Nerris- Frostina
Ered- Pakkun
Harrison- Jinta