Domaimer is one of the Unfortunate Friends. She can be found on Lemuse Beach.
Luka finds her on the beach, trying to make her way to the water, but to no avail. Luka is confused, but Amira recognises her and asks if she wants to come with them. Sonya remarks on her unfortunate condition, but Ilias replies that they're called the Unfortunate Friends for a reason. Domaimer will join you, in the hopes of finding water in the Pocket Castle.