Is queen fairy Teresa یا not?

Probably no. Her archetype is like on Aunt Elisabeth/ Azura/ Enchatress- magical (or not so) helper of protagonist. In سوان, ہنس Lake, probably only Barbie, as Odette, and Summer as Marie (but, in 2003, when سوان, ہنس lake was came out, isn't Summer, lol).
Also, I think, that in old classical فلمیں from Barbie's دوستوں was only she herself. Teresa, Summer and Nikki appears later, in Diamond castle, Christmas carol & Three musketeers.