If the ninja lived in our universe, and in modern times.

Kai: He'd probably be a really famous influencer. 

Nya: I'd feel like she'd be a feminist and a water park owner. I'm not sure, or maybe an inventor

Jay: TV show host. He's good at that. Or an inventor.

Zane: Chef... He's good at cooking

Pixal: Probably would be an assistant at some big place like Apple or Microsoft.

Cole: Lumberjack? Miner? Baker? Food show host? Food taster?

Seliel: Hairstylist

Skylor: Bish she already runs a Noodle Empire you best believe she has one in our universe

Lloyd: Candymaker, or teacher.

Kaylee: A famous singer maybe, but maybe also a teacher.