Iona

Iona is the Mental Model of the submarine I-401 in Arpeggio of Blue Steel -Ars Nova-. She defects from the Fleet of Fog and chooses Gunzo Chihaya as her captain, becoming the core of the independent Blue Steel fleet.

Iona and the submarine I-401

Quiet, literal, and initially unfamiliar with human emotion, Iona becomes increasingly curious about friendship and personal will. Her loyalty to Gunzo is not simple programming; it develops through shared danger and decisions that separate her from other Fog vessels.

Choosing Gunzo and challenging the Fleet of Fog

As I-401, Iona uses advanced stealth, torpedoes, a Klein Field, and the super-gravity cannon. Her encounters with Takao, Haruna, Kongou, and other Mental Models encourage them to question the Admiralty Code.