Movie
Description
Ranmaru Kurosaki hails from a family whose former wealth rivaled the Jinguji and Hijirikawa clans. His Japanese father, betrayed by a colleague, caused the Kurosaki Group's bankruptcy and immense debt. Following his father's work-related death, Ranmaru shouldered the debt burden, leaving his Italian-American mother Giulietta and younger sister Juri behind to pursue an idol career for repayment. This history, compounded by previous band breakups involving women, fostered deep trust issues and a cynical outlook.

Standing 182 cm tall and weighing 67 kg, Ranmaru sports spiky silver hair, dyed since childhood, and has pale skin. Though seemingly heterochromatic, his natural eye color is silver; he wears one purple contact lens for aesthetic effect, typically paired with dark grey eyeshadow. His signature style features skin-tight shirts and houndstooth checkered vests.

Highly reactive and moody, Ranmaru embodies tsundere traits. He openly identifies as a rocker, initially dismissing non-rock music and refusing collaboration with Haruka due to her gender – a stance rooted in his past band experiences and family betrayal. Despite his abrasive exterior, he possesses a strong sense of duty and underlying kindness, evidenced by helping elderly couples repay yakuza debts and regularly feeding neighborhood strays. Pragmatic about finances, he lives modestly, channeling idol earnings primarily into debt repayment. His demanding schedule has honed his ability to sleep efficiently during brief breaks.

A bass guitarist, Ranmaru affectionately calls his instruments "girlfriends." As part of QUARTET NIGHT, he mentors juniors Masato Hijirikawa and Ren Jinguji, childhood friends from his affluent past. Initially dismissive of ST☆RISH and reluctant in mentorship, group activities gradually fostered tolerance. His QUARTET NIGHT relationships are complex: he shares a vitriolic yet intuitive bond with Reiji Kotobuki, who teases him but understands his vulnerabilities, while frequently clashing with Camus despite acknowledging their musical synergy during performances.

Across media, Ranmaru exhibits subtle development from isolation towards reluctant camaraderie. In games like *All Star*, he protects Haruka from scandals through self-sacrificing actions, later attempting a romantic confession. He reconnects with childhood experiences, showing sentimental attachment to a stuffed bear and demonstrating English fluency from his U.S. residency. Recent appearances, such as the film *TABOO NIGHT XXXX*, integrate him further into QUARTET NIGHT's endeavors, focusing on his ongoing financial struggles and evolving group dynamics.

Minor details include his Libra zodiac sign, September 29 birthday, preference for using first names with acquaintances, and dark red theme color. His hobbies are napping and cooking, with a noted fondness for meat-based meals.