I think in scarlet's case, and correct me if I'm wrong... it's not like... real as in unscripted per se as much as they're dynamic. Like, if you accept there are two girls who are completely ridiculous in the way they're presented, they're a 'realistic' character in that they tend to react to the situations, people, etc, rather than just being something that's phoned in and doing the flowchart every week. Like a guy like Finn Balor is more grounded, but you can't actually believe a guy like Finn Balor as presented would say or do the things he does, most of the time.
Basically if you can suspend disbelief that these people actually exist they're characters that actually seem like internally consistent characters rather than just plot devices which is more than you can say about like 90% of the roster.
This is a cute and pop genocide of love!