Unbirths meaning "those who hearts were reborn through darkness", are the main enemies of the Hikari ochiru series. They are also known to "feed off darkness, negative feelings and hatred in people's heart", the list below shows the unbirths that made there appearance.
Shade
Blue Jazz
Infernal Caliban
Blue menace
Hybrid
Jester
Shade X
Shade walker
Silent stalker
Possessor X