Before the outbreak — before the transition — Crowley was a rather happy individual, and parts of that personality continues to exist to this day. He is a man of many words, and it's very obvious from a first impression that he loves to talk — not because he's egotistical, or loves the sound of his voice, but simply because he enjoys living life. Conversations are the highlight of his day, and he loves to talk with everyone, no matter who they may be. Psychology is something that Crowley's always been fascinated with, and he simply takes great joy in being able to experience life, and being able to experience different people from different walks of life. Because of his something hyper nature, there are many people that criticize him for it — they claim he's too naive, too childish. But Crowley doesn't mind; he is who he is for a reason, and he doesn't believe anyone can fault him for just wanting to live life. Even after being infected, he's never lost his passion for life.

But there is darkness lurking in Crowley's heart: being turned into a monster, a predator, wouldn't completely leave him without emotional scars. Only recently mutated into a Level V, he still struggles with controlling his bestial need to hunt and feed. He lacks control over his own emotions and desires, and much as he despises the monster he's turned into, he can't always prevent himself from acting out his innate needs — much as it kills him every time, considering the level of empathy he has for other humans. In an unfortunate twist of fate, Crowley was born with hyperthymesia, a condition in which he remembers an abnormally large number of life experiences in vivid detail — a condition that haunts him. He remembers every single person he killed when he was infected — from the moment he began the hunt, to the end when he saw the life drain from their eyes.

These memories cause Crowley to have a form of PTSD, forcing him to relive the horrors of what he'd done during the night in the forms of nightmares — and during the day as well, snippets of memories drawing him out of reality at the most unfortunate of times. These memories remind him that he's no longer human, that he's nothing more than a monster, and his mind has begun to try and cope with these traumatic flashbacks by causing him to blackout. During these blackouts he becomes an entirely different person — almost as if the humanity he regained is being shoved back down once more, to hide the guilt and shame of what he's done and instead be replaced by a persona ruled by the virus. He becomes impulsive and reckless, a twisted person that just wants to play games with others and use his infection for less-than-savoury reasons. It's during these blackouts that he loses sense of who he is, and when he returns back to himself again, it's as though he's coming out of a fog.

Crowley tries his best to remain the person he was before the outbreak, a hedonistic individual with a passion for life and a strong empathy for living creatures. Over the past few months since his mutation, he's become a very friendly and flirty individual, enjoying the chase with another person. A friendly flirting game with another person is acceptable, but he would never progress past that — unless he's in a blackout state, in which he becomes someone that is far more aggressive in his advances. He struggles with his PTSD and hyperthymesia, and it's something currently only his best friend knows about him. Only time will tell what will become of Crowley; whether he will overcome the infected darkness taking over his heart, or if he will fall to it completely.