*The incantation (transformation)
*The eyes (sign of returning to origins)
Delkira in Ali-san
*The mana signifying of Delkira's existence in Ali-san but it came from Sulli grandpa, theory that Sulli might be holding a part of Delkira
*The flashback a few chapters ago in Heartbreaker arc (I think, if I'm not mistaken) when it showed that Delkira entered some sort of door and disappeared
*THIS NOW FREAKING LEADS TO A THEORY THAT HEYYYYY IRUMA MIGHT NOT BE COMPLETELY DELKIRA BUT HE IS! THO A HUMAN, HE MUST BE A VESSEL OR INCARNATION THAT HOLDS DELKIRA'S SOUL OR EXISTENCE OR A HUGE PART OF HIM THAT GODDAMN IF WHATEVER INCANTATION THAT WAS MENTIONED WOULD ENABLE IRUMA TO TRANSFORM INTO A DEMON BY RETURNING TO HIS ORIGINS THEN CAN WIELD DELKIRAS POWER AS HIS!!!