Hakkekkyuu U-4989

U-4989 serves as both a trusted colleague and close friend to protagonist U-1146, instantly recognizable by his curly hair and a remarkably expressive face that shifts with every emotion. Where the lead character tends toward quiet seriousness, U-4989 brings levity and sharp wit, often stepping into the role of the group's comic foil. Though he carries himself with an easygoing, sometimes goofy charm in everyday moments, the moment harmful bacteria breach the body's defenses, his neutrophil instincts kick in without hesitation—revealing a focused, battle-hardened side that makes him an indispensable guardian of the body's well-being.