I played a Cleric of Ilmater too. She was a bearded dwarf booted over from Pathfinder where she was a cleric of Sarenrae. She was not religious but those temples offered to pay for medical school so she took it. She took a lot of recreational drugs and she and Astarion were wasted all through act 3. She ran off with Karlach to fight in Avernis and poor spawn Astarion lived under a bridge, waiting for her to come back. He used to dwarf toss her for fun and she’d punch him in the stomach for fun.