- Note: This section relies heavily on speculation. Very few facts are offered in game to substantiate most of the information here.
The Soul of Dragonslayer Armour is the only mention of these butterfly creatures. Upon close inspection, they are revealed to be composed of flesh and bone, and they are almost bent backward, with their rib cage jutting outward.
- While passive throughout the course of the level, Pilgrim Butterflies will attack during the second phase of the Dragonslayer Armour's boss battle.
- The butterflies are actually the ones controlling the Dragonslayer Armour.
- The trees portraying hollows born from their logs in the High Wall of Lothric resemble these creatures.