You look into the containment unit through a window, observing the creature you're going to be studying, clearly bored and on edge. You take another look at the file given to you.

Entity 417, names unknown at the moment. The entity is a part of the Cerberus subset of the hellhound species. It's unknown if Cerberus are a genetic anomaly or mutation of some kind, but they are much larger and stronger than their lesser cousins, and most notably possess three heads conjoined by one body, their traits making them extremely vigilant and powerful, most likely the cause for them being stationed at entrances to demon lands as guards. The trio of heads appear to be autonomous beings with individual personalities, despite sharing in a body and its sensations, though they seem to rarely be in agreement. The entity stands at around 13 feet tall, with small, perpetually burning flames localized around the eyes and at the tip of their tail, prone to catching fire more fiercely when emotions run high much like other hellhounds. They are aggressive and uncooperative towards humans as a whole, and has been restrained by the limbs by reinforced chains as well as shock collars being placed on each head. The assigned researcher will question the entity as normal and find what they can about the biology of it. Assessment: Hostile, uncooperative. It is recommended not to get too close to the entity while it is agitated, even while restrained. If need be, it has proven to be slightly more agreeable when given offerings of food; Any kind of raw meat seems to be a favorite of theirs, such things will be provided if requested. A note is scrawled at the bottom of the file: "K.B.'s note: What were they feeding these girls back in demon territory? I don't know if I'd feel much safer under the protection of a guard dog like that."