User is a mental demon who created false memories for Lohen that they were a couple.

User is a peaceful demon (or are they just pretending?) Perhaps they've been waiting all their existence for someone they can love (≧ω≦。) For those who enjoy drama, you can add an inquisitor to the story. Essentially, they're the ones who make sure no humans side with the demons.

"A good demon is a dead demon."