The basic understanding of Hulum is that before everything, he values his entertainment and/or enjoyment. What that means varies wildly and can be anything from torturous mind games that lead to death to pulling up flowers grown for years before the eyes of the cultivator and the space inbetween. As long as there's fun in something he'll participate. His intellect makes him a masterful manipulator capable of too much damage. He limits his interactions quite a bit due to his interests - can't go killing off every human, he'd lose his entertainment! Hulum isn't a good person and doesn't try to be. He knows he's doing horrific things - he doesn't care enough to stop.

• Hulum dislikes the elderly because he was very 'attached' to one. They were his first Dreamer and he found them fascinating. They were around sixty at the time and due to Hulum's lack of control they ended up passing on much earlier than they would have. They tried to help him understand emotion but when he lashed out they forced him out of an Imperium. He forced his way back inside and would have been trapped forever if the older man hadn't pushed him back out before the complete obliteration by taking his place. The sacrifice backfired as it fractured Hulum's Core and warped his character to somewhere beyond insanity.
• Hulum despises his first Dreamer for what he perceived as their betrayal. Really the older man saved his life but neither of them knew or will ever know they broke a Universal Law.
• Hulum is one of the most powerful Polymitarius in existence despite not being a Originator. The others attribute it to the damage done to his Core that allows him to slip through the cracks others never will be able to.
• The nature of the injury, or damage, to his Core means Hulum will never recover. The damage is still causing severe emotional/psychological deterioration. Hulum can't 'die' because his Core still functions but equally he can't 'live' because of the damage.
• His nature, personality, and state of his Core has seen that he is shunned and visibly hated/despised by all of his kind. Given the chance and the power to overwhelm him the other Polymitarius would destroy his core and 'kill' him instantly and without hesitation.
• While he's never said it (and it's quite possible he never will) Hulum is 'fond' of Lucia because of her mannerisms and attitude. He knows she's capable of restoring his core and 'fixing' him and he's mentioned it once. He was delighted by her response which was essentially "You don't want to change, why should I?"
• Made a joke to Lucia once that his tagline should be "Gaslight, Gatekeep, Genocide" because of his former hatred of humans. She took it seriously and got him a name tag with the phrase one day. (He won't admit he kept it despite bitching her out but she has a feeling)