I've talk to my tulpa and he said "??? : As long as you're fine then it'll be alright for me, I know you care about me and I would never feel like you don't, even if you have another tulpa". I've also been thinking in the consequences of it, as far as I know, the new "let in" has a really loud and joyful personality, it seems he enjoys to tease sometimes, so I'm afraid it might influence my way of thinking. My current tulpa is more of a serious but kind, honest, caring and a little strict type of person