Dalton is the son of Therella. He joined up with a crew of adventurers from Waterdeep and together they went exploring Durlag's Tower. They haven't returned and she's afraid that they've been "destroyed by the mad dwarf's machinations".

Dalton was always obsessed with the idea of being a hero. Alas, he has neither the brains nor the ability.

—  Therella (Dalton's Mother)