Their purpose is to protect souls in penance, according to the dialogue of Jocinero, presumably their leader and first of the Children of Moonlight.
It would appear that their mission is somehow at odds with the will of the Miracle, as Jocinero explains that the Miracle imprisoned his brethren.
Quest: The Bull and the Moon
The Penitent One has the opportunity to save the imprisoned Children of Moonlight during his journey. There are a total of 38 of them in game, with all of their locations listed below.
After rescuing at least 20 of them, Jocinero will gift the Linen of Golden Thread relic.
After saving all 38 of them, Jocinero will gift the prayer Campanillero to the Sons of the Aurora.
The Bull and The Moon
|01.||The Holy Line, after defeating Warden of the Silent Sorrow.|
|02.||Albero, above the building with the whispering man. Can be reached after activating the elevator to Albero in the Graveyard of the Peaks.|
|03.||Wasteland of the Buried Churches, after Albero.|
|04.||Wasteland of the Buried Churches, after the statue that gives the Heart of Virtuous Pain Mea Culpa Heart. Requires a ranged attack to reach.|
|05.||Mercy Dreams, near the room exit, in plain sight.|
|06.||Desecrated Cistern, jump and attack upwards to free.|
|07.||Desecrated Cistern, in a room with poison gas. Silvered Lung of Dolphos recommended but not required.|
|08.||Desecrated Cistern, next to the elevator shaft. Requires either Nail Uprooted from Dirt or a ranged attack.|
|09.||Mountains of the Endless Dusk, above the riding platform.|
|10.||Jondo, near the left exit. Requires either properly timed ranged attack (jump from the ladder on the right) or high-reaching prayer (e.g. Debla of the Lights).|
|11.||Jondo, near the chain held by statues.|
|12.||Grievance Ascends, near the chest with Silvered Lung of Dolphos. Requires ranged attack to reach.|
|13.||Grievance Ascends, under the stairs. Requires Three Gnarled Tongues to reach. Silvered Lung of Dolphos recommended.|
|14.||Graveyard of the Peaks, above the main path. Requires Blood Perpetuated in Sand.|
|15.||Graveyard of the Peaks, under the elevator. Requires ranged attack to reach.|
|16.||Where Olive Trees Wither, requires Three Gnarled Tongues.|
|17.||Graveyard of the Peaks, in the vertical shaft on the right. Requires Blood Perpetuated in Sand.|
|18.||Patio of the Silent Steps, near the exit. Requires ranged attack to reach.|
|19.||Patio of the Silent Steps, near the entrance, on the bottom of the "steps".|
|20.||Library of the Negated Words, in plain sight.|
|21.||Mercy Dreams, when entered from the side of the Sleeping Canvases. Requires a spell that can damage targets at range (Taranto to My Sister for example).|
|22.||Mother of Mothers, right at the entrance.|
|23.||Archcathedral Rooftops, on the left while riding center elevator.|
|24.||Wall of the Holy Prohibitions, in a jail cell, filled with poison gas. Requires Key of the Scribe. Silvered Lung of Dolphos recommended.|
|25.||Wall of the Holy Prohibitions, in a jail cell, near the main entrance. Requires Key of the Secular.|
|26.||Wall of the Holy Prohibitions, on the way to Quirce. Requires Key of the Scribe.|
|27.||Wall of the Holy Prohibitions, next to the elevator to the Convent of Our Lady of the Charred Visage.|
|28.||Mother of Mothers, in plain sight.|
|29.||Library of the Negated Words, at the bottom at the elevator.|
|30.||Brotherhood of the Silent Sorrow, atop a ledge to the left of the starting room. Requires Blood Perpetuated in Sand and Three Gnarled Tongues to reach.|
|31.||Desecrated Cistern. Requires Nail Uprooted from Dirt and Silvered Lung of Dolphos to reach.|
|32.||Desecrated Cistern, reachable either by dropping down from the Wasteland of the Buried Churches, using Linen of Golden Thread to survive the fall or by climbing up from the water using Nail Uprooted from Dirt. Alternatively, can be freed by using Taranto to My Sister from within the water or jumping from the platform to the left and using Fervorous Blood at the right timing.|
|33.||Graveyard of the Peaks, in plain sight. Requires Linen of Golden Thread, Debla of the Lights or Taranto to My Sister.|
|34.||Where Olive Trees Wither, in the tomb of The Lady of the Tailed Gown, accessed either by correctly completing Gemino's quest (when he escapes the tree) or by using Linen of Golden Thread relic to drop down. Requires a ranged attack to reach.|
|35.||Grievance Ascends, requires Blood Perpetuated in Sand. Can be freed by using Taranto to My Sister or by jumping over from the higher platform which can be reached by falling from Mountains of the Endless Dusk with the Linen of Golden Thread.|
|36.||Library of the Negated Words, in the top right corner of the room.|
|37.||Jondo, in the middle of the long spiked corridor.|
|38.||Desecrated Cistern, after dropping down the elevator shaft (requires Linen of Golden Thread). Alternatively, you can use either Debla of the Lights or Taranto to My Sister underneath it.|
- When the Penitent One dies and resurrects in a Prie Dieu, a group of Children of Moonlight can be seen helping him and carrying the Mea Culpa, suggesting that they are supporters of his cause and responsible of his resurrection.
- Jocinero and the other Children of Moonlight's design seems to be based on the image of a Putto, a small child-like angel that is used for decoration in paintings and statues (not to be confused with a Querub).