I never talked in the third person. My abusers had a code of conduct for me that included "do not tell or else this or that would happen" because of this my alters and I did not do anything that would result in telling the secrets that we held inside, including the alters existence. talking in the third person would have resulted in others around us asking questions....

example sitting in school if I said she knows the answer or they want to play ball, or She wants to play on the swings or rainy wants to play on the swings... a teacher would ask "who is she?" " who is Rainy?"

in therapy if I would have said we are going to go to the movies my treatment provider would have asked who is we?

the result was alerting others to the alters existence, which went against my abusers rule of do not tell.

so to follow the do not tell rule, I and my alters were always speaking in the first person (I, me , my, mine,...)