Genesta

Genesta, the Good Fairy is the Queen of Tamir. She lives on Fairy Island. Her talisman was stolen by Lolotte. Genesta sent for Rosella to get the magical fruit and the talisman in order for her to be saved. Some say she is the queen of all fairies but this is likely only in the realm of Tamir where she rules, as Titania is Queen of the fairies in Eldritch, and Culatha the queen of the fairies in Old Wood near Daventry.

Behind the Scenes
In the KQ4 Hintbook, she is referred to as The Good Fairy, Genesta

In Quest for Glory, if the hero looks at the painting of Erana, it says that she reminds him of Genesta a faery he once knew.