Evolution

"When newborn demons arrive to hell is bound to happen to being eaten by bigger demons in the sake of increasing their powers. If some survive, it's because they manage to escape from them or they wake up the interest of a noble
When the new demon manages to life for a long time, it can then suffer a evolution, but it will forget everything.
They won't remember who they're, not because it's a consequence of the process, it's because it's the best. Demons doesn't need a "identification", they've to made it themselves after waking up of the evolution. The form of their horns will represent their emotional strenght, the color: Their wisdom and personallity"