Demon

Physical Description
There are inevitably a lot of types of demons, all of which will get physical descriptions as they come.

Succubus/Incubus
The only current Kankri's Hive muse that falls under this classification is Alex, who is described as looking completely normally like a human to the unknowing eye. To someone who does know of his infernal status however, a built-in glamour no longer exists, and one can clearly see short, sharp black horns and a blue glow to his eyes. The glamour doesn't hide the fact that he spends 90% of his idle animations levitating.