Crimson's Symphony of Darkness: A Transformation Beyond Imagination

Your request is very detailed and interesting but one point needs to be mentioned: Crimson from the Helluva Boss series is, as far as official sources go, not an established or recognized character. The show does feature a tough mafia-like boss named Asmodeus, who is a deadly ruler in the Wrath Ring of Hell. Using your detailed description, I can change the character of focus to Asmodeus, who is quite distinct in his own right, with a glamorous appearance and a desire for power and control. If it's as necessary to stick to the character named Crimson, it's important to acknowledge that this would be solely fan-made content. For the story portion, assuming that the boy's name is "Max": Max, nine years old, was a typical boy who loved to play outside and had a vivid imagination. But something was about to change his life forever. One day, Max was playing alone in his room when he suddenly felt a strange sensation. It was as if the world around him was fluctuating, warping, and changing into something else. His surroundings twisted and turned, and he found himself standing in Imp City, part of Hell in the animated show, Helluva Boss. His heart pounded with fear as he looked at his reflection in a nearby glass window. To his surprise, he was taller, appearing closer to the height of Blitzo, one the imps from the show. The hair on his head and the horns peeking out from beneath his new black fedora, were white. His eyes were framed with white markings, the right bigger than the left. He was no longer him. He was becoming someone else. He tried to cry out for help, wanted to call out to his parents, but he found himself unable to speak their names. It was no use. Their faces and their names were quickly fading away into the vast expanse of his memories. In place of his own consciousness, new memories filled his mind, the memories of a demonic mafia leader, Crimson. His body ached and creaked as it grew with the progression of time. He was aging rapidly, as if decades were passing within seconds. His human hands morphed into short-clawed fingers. He groped and felt the reality rippling around him, a world far too sinister than his previous one. His clothes changed as well. He was dressed in a red high-collar shirt, a navy-blue coat with light blue accents, thin red stripes, red buttons, and red lining. His legs, now ending in cloven hooves, wore dark blue pants with thin red stripes. He donned black and red-heeled dress shoes, a black fedora, and a red and white band. Max tried to hold on, to resist the change, the alien personalities and memories pushing against his own, like slabs of rock pushing against each other to cause earthquakes. The tremor was overwhelming. He felt his personality shift from a cheerful, innocent boy into a ruthless, intimidating crime boss. As Max's memories faded away, a sinister grin crawled on his new face. He looked at the world again, but not through the eyes of Max. His vision was all Crimson, everything around seemed part of his power, his reign. He relished smoking and any form of monetary gains. The demons that passed by were seen as his organized crime family, and compared to him, they all were lesser beings. Inexplicably, he found pleasure in the body parts of his victims hanging as house decor. He closed his eyes, slightly overwhelmed by the memories that filled him. In one, he was seen mistreating Moxxie, a character from the Helluva Boss series, and his heart echoed the harsh, ruthless beat of a mafia leader. Despite the insane transformation, the new-found evil persona just seemed fitting. He wasn't Max anymore. He was Crimson in appearance, in status, in power, and in essence. With a new malicious smirk on his face, he muttered to himself, "This is the life..."