Kiiro Iijima balances her civilian career as an idol singer with her heroic role merging with an Iczel unit to become Iczelion Gold. As one of Earth's armored defenders against the alien invaders Chaos and Cross, she wields wind and earth-based elemental attacks via specialized weapon modules mounted on her hips. Her signature abilities include the Expanding Barrier Blast, Meteor Shower, Tornado, Tornado Kick, and Double Super Tornado.

Kiiro fights with energetic agility, often mocking her opponents mid-battle. Her personality radiates enthusiasm and a distinctly girlish demeanor compared to her fellow Iczelions. She operates alongside Iczelion Black, Iczelion Silver, and eventually Iczelion (Nagisa), participating in coordinated missions and joint attacks against major threats like the giant Void merged with Cross.

Actively contributing to the team, Kiiro helps convince the reluctant Nagisa to embrace her destiny as an Iczelion. During combat, she intervenes decisively to protect Nagisa from Void assaults, separating threats to enable regrouping. Her spirited fighting style and personality solidify her role as a capable member of the Iczelion team.