Lost is a young red dragon (around 20 years old) who has taken the form of a young tiefling. Lost - unlike other red dragons - is embued with an ability to Plane Shift on command. After being accidentally brought to the group by a seagull when looking for Dewi outside Neverwinter, he decided to stay with the group, shifting into a form like Elly's.
After being kidnapped, he was gifted a flute and has been trying to learn it.