Nami Shiina operates as Iczelion Black, a warrior bonded with the sentient armor Iczel Black to defend Earth from alien threats. By profession, she is a rock singer and rave dancer at a nightclub. She possesses unwavering confidence and self-assurance within the Iczelion team. Her gravity manipulation powers define her combat style, enabling signature attacks like Gravity Barrier Ram, Implode Gravity Vortex, Gravity Well, and the beam sword technique Gravity Slash. She exhibits exceptional proficiency in both beam sword combat and hand-to-hand fighting compared to her teammates and generates their strongest defensive barriers. During battles with antagonists like Cross, she directly intervenes to protect fellow warriors such as Nagisa Kai. She maintains a partnership with Iczel Black, sharing similar personality traits. No concrete information exists regarding her background, origins, or personal history beyond her professional occupation. Official media does not depict her participation in other seasons, films, or spin-offs beyond the original OVA series.