Karla NPC LocationArea: Irithyll Dungeon
Closest Bonfire: Profaned Capital
Where to find: You’ll first need to find the Jailer’s Keyring. Get to the church in the toxic lake. Climb onto the roof, then use the stairs on the left to get into the dungeon. Follow the corridor to the end and you’ll see the keys on a corpse.
Once that is done, teleport back to the bonfire. Follow the stone bridge back into the dungeon. The cell where Karla is being held is on the lowest floor, the one you’ll enter, with all the jailers. If you’re having trouble with them, you can draw them out onto the stairs one by one. Once the room is clear go into the far left corner. Open the cell and you’ll see Karla on the floor.
When you’re back at Firelink Shrine, look for her below the blacksmith’s workshop, to the left. She can interpret the pyromancy tomes Cornyx cannot, as well as the Deep/Dark miracle tomes that would drive Irina insane.