The sun that had once fueled Rengoku's unwavering determination now taunts him, a mocking reminder of his lost humanity. His crimson eyes, once brimming with fervor, now gleam with a sinister hunger as he roams the night, seeking out souls to feed upon. Though his form is now monstrous and fearsome, there lingers a glimmer of the warrior he once was, buried deep within the abyss of his demonic nature.