Demonic Conversion

A demonic conversion is a ritual were mortals, half-demons and other beings can become a demon.

Types of Conversion
Two types have been seen in the show:

The Academy
Mortals are recruited into a demonic academy and have to follow a brutal training program. They earn chevrons which represents the status of their conversion. In order to complete this conversion, the mortal has to kill another mortal.

Killing Mortal Relatives
The half-demon Sirk, had to kill each mortal relative in order to become fully demonic. With each kill he would get another power until he killed the last relative. During the conversion, he would turn into his demonic self and lose his mortal appearance.