The moment I saw Spinel in the Steven Universe film and noticing how the gem was acting silly and moving in a very stretchy way, like in the old cartoons, imagining 1998 Cartoon Network (my version) acting like her was something I wanted to try out here. Considering, outside of backstory, sillyness and stretchyness are two of Cartoon Network's traits I've given to him may not be surprising, but quite fitting.