While most voidsent thrive off rich aether to satiate their needs, this fellspawn has formed other methods of sustenance; it has been rumoured to feed off the emotions of others. It's stated that it has formed a penchant for "negative emotions" of mortals.

#Lambslore
Arlaut-Hedeaux Gielapanc
known as H.G. or “Mr. Mercury“
A recluse alchemist from Brumes of Ishgard who rose to prominence through his discoveries and proclivity during the Dragonsong war. It’s said he had a hand in creation of the armor involving dragon blood to treat the metal.

#Dreadlore
It's hard to discern the nature of the beast and what end does it serve it. On one hand, it is perceived as connected to voidsent and other fiends; their shadowy presence is seen as an omen, and their myriad of maws and eyes inspire fear among those who meet it.