Tess Dyer is a spellcaster who appear in the The Sims 4 Realm of Magic Official Trailer. She is the former Sage of Untamed Magic, before Morgyn Ember, and she can be find on the gallery in a household with Keisha Hughes and Ethren Reyes.
According ot the official The Sims Twitter page her name is Áine, but the official uploaded version of her has the name Tess.