The Fire Keepers primary purpose is to level your character up. By speaking with her at Firelink Shrine , you can give her souls in exchange for levels. As with previous games, the amount of souls needed will slowly rise, starting with only need several hundred and getting to the point where you need 50, or more. In order to obtain one, you must purchase the Tower Key from the Shrine Handmaid for 20, souls. Use this key to unlock the tower behind Firelink. Climb up there and you'll find the soul. She is also key to the End of Fire ending to the game. To do this, you need to give her the Eyes of a Firekeeper, which can be found in the alternate Firelink Shrine past Untended Graves.
Fire Keeper Soul
She is voiced by Oliva Mace. She can also cure dark sigils the player has accumulated when provided with a Fire Keeper Soul. The Fire Keeper can always be found tending the bonfire in Firelink Shrine.
The Fire Keepers were robbed of light, to better serve as vessels for souls. Only those who cherish the writhing, searing darkness were given the keepers' black attire. Allows the player to level up in exchange for souls. Can also cure hollowing when provided with a Fire Keeper Soul.
I loved him for THAT. There is no question this is the true church. That is why there are home teachers, friends, family members, neighborsвto provide priesthood blessings. Maybe it won't be a big deal.