Ok first off if it’s a child that’s a red flag ,bc when they say it’s rare to get as a child they mean you have a higher chance of winning the lottery twice than getting did as a kid

Second they’re acknowledging their so called “system and remembering every time they switch and what not. Or pretending to switch and start rping as they’re switched like they do shit like this “-Dan” Or “-sashaaa uwu” That’s not how it works

When it’s self diagnosed,it’s literally impossible to do

When their alters are all dsmp characters or all cartoon characters

When they use it as a weapon in arguments or drama

There’s more but I can’t think of it rn