She and her daughter Zintuḫi were closely associated with the Sun goddess of Arinna; together they formed a triple deity.
Mezulla had only local importance and is not mentioned in the oath lists of Hittite interstate treaties.
As the daughter of the two chief Hittite deities, she could be called upon to act as an intermediary with either of them, especially their mother.
No other temples of Mezulla are known, but worship of her is also attested in Ḫattuša, Taḫurpa, and other north Hittite cities.
Queen Puduḫepa mentions her with the unclear epithet "Clothes pin on her breast."