Milfanito
Trapped Milfanito
Trapped Milfanito
The Milfanito are a group of 4 sisters that sing to the Undead. They do not have individual names, and think of themselves as one entity. As their name and Singer's Dress implies, they were given their power by Gravelord Nito of Dark Souls.
Two can be found around Shrine of Amana, and one of them is locked in a cage inside Drangleic Castle.
Will talk to you and reward you for helping them.
You don't need to release all three of them to allow you to access and use the altar at Shrine of Amana (after the final bonfire, Rise of the Dead), an alter which allows you to become human without using a Human Effigy. (Note: this seems to conflict with a statement below.) However, you must not kill any of them for the door which leads to the alter to open.
In order to be revived by the altar, you can't have human effigies in your inventory or box. Also, dropping them do not work. I discarded all of my 73 human effigies to test it, and it worked. So, basically, you must be hollow (doesn't matter how much, I tried at many points of hollowing) and have NO human effigies at all. Also, you must have rescued the other 2 Milfanitos to use it.
They don't have gravestone if you have killed them. (needs confirmation)
Because of her rusty clothing, the second Milfanito is often mistaken for an enemy, especially when she's seen from a distance. Some players use the the hex Affinity which automatically chases all NPCs, and this ends up killing her accidentally. It's also possible to lock onto her like other enemies, DO NOT cast any homing spells on her or else you'll have to either wait till NG+ or burn a Bonfire Ascetic to respawn her so you can seek for Aldia Warlock. You can skip Demon of Song if you visited the bonfire before though.
Oddly, Milfanito is listed as an enemy in the official Far Fire site, whether it's the second Milfanito or the hollow crawlers is another question.
If you accidentally killed the second Milfanito, using a bonfire ascetic on Rhoy's Resting Place bonfire will respawn her, since she's counted as an enemy instead of NPC, allowing you to save her and subsequently access the locked door at Rise of the Dead bonfire (and by extension, the Aldia Warlock)