Tasha is another wizard well known for her power and knowledge of the Abyss. The version of Tasha that the players meet is a younger Tasha from the past still just as powerful but not Tasha the Witch Queen. She is very good friends with Alustriel and came to her aid to stop Vecna immediately without hesitation.
Rix is a huge fan of Tasha and her works and was in awe when the party came across her and the other wizards.