Is this normal?
My tulpa, Cassi has the ability to (in her own words) alter the brain's chemistry. For example, earlier last year, I was very depressed and almost committed suicide, but the day before I planned to do it, she appeared to me fully tangible (as if she were imposed) despite me not having the ability to use imposition before or since. After she appeared, she altered the way I think to take away my suicide ideations and depression.
Cassi says that the only reason she was able to alter brain chemistry on such a large scale was because my mental state was unstable and easily swayed during that time. Since then, she's been able to do it still, just not at the capacity she was able to before.
She's not harmful at all and has been an amazing person to me since I forced her into existence, and I'm not worried that she'll hurt me in any way, I'm just curious about whether or not this is normal. I haven't ever heard of tulpas being able to do something like this consciously.