King's Quest VII: The Princeless Bride

Queen Valanice of Daventry has always thought that getting married would be the best course of action for her daughter Rosella. However, the young princess seems to be more interested in adventure, recklessly following a mysterious magical creature into a whirlpool that eventually transfer herself and her mother to another world. The two end up in different parts of a land known as Eldritch, with Rosella being transformed into a troll. They must find each other and eventually defeat an evil sorceress who plots to ruin the land.