the diagnostic criteria for DID says they can and do. thats what DID is - having two or more alters that take control of the hosts behaviors and live separate lives from the host (main person). they might have their own bank account or their own clothes, some even have their own homes separate from the host.

example you wouldnt catch me in a waitress uniform working in a bar, flirting with the customers, smoking on breaks but one of my alters was a waitress in a bar, smoked and drank. I neither smoke nor drink. but three of my alters did. I have a fear of heights but two of my alters love being up high in balloons, airplanes, the empire state building, the observation deck at Niagara falls, and other tall buildings. I like to have apartments and homes on the first floor and they loved the higher the better on anything. when my partner and I were packing up to move where we are now I found 6 bank account books that 6 of my alters had going that was separate from my own bank account.

having alters do things out of character from the host is what being DID is. each system of alters is made up of all kinds of alters. some are just like the host as protectors to ensure others dont notice things and there are at least two that are out of character from the host. most system of alters is also made up of alters of varied ages. my system of alters ranged from ages 2 though 20. and a couple older than that.

alters can be any way shape and form that the host needed in order to survive including doing things the host would not normally do.