Killonn

"I was meant to be Spherus Magna's ruler from the first day of my banishment from the underworld"  - Killonn, Bionicle Legacy: The Dark Ages

Early Life
Killonn was once a general in the Underworld serving under a Noble Demon named Dexia. As time went by a rogue demon called Scar started a rebellion against the ruler of the underworld Skatrixx, so Killonn was ordered to defeat and capture Scar. When he finally confronted Scar and was about to capture him Scar attacked Dexia this angered Killonn so he brutally killed Scar with his bare hands before he could harm Dexia. Due to this, Killonn was put on trial before the Noble Demons because he was supposed to capture Scar not kill him.

The Noble Demons found out about a secret that was between Killonn and Dexia they found out they were in a romantic relationship, since Killonn was a lower rank than Dexia it was not allowed. On the day of his trial a demon named Lucifer who was Killonn's lieutenant and his most trusted soldier, tried to stand up for him but failed. Right before Killonn was about to banished he begged Dexia to say something but she stayed silent and that enraged Killonn to the point of cursing at her than he left the underworld.