iona (aoki hagane no arpeggio)
Lead female character from Aoki Hagane no Arpeggio. The Mental Model (human avatar/personification) of Blue Steel's submarine, the I-401.
She has long pale blue hair (grey hair in the manga) styled in a hime cut with rough bangs (anime) or blunt bangs (manga) and green eyes. Her standard outfit from the anime is a blue school uniform with detached sleeves, and boots. In the manga her standard outfit is composed of a short sleeve shirt, shorts, striped thighhighs, and shoes.
While the other Mental Models generally dub themselves after their ships, Iona's name is separate from the submarine, one she herself and the people within Blue Steel and its circle use. This is why Iona and the I-401 have separate tags in Danbooru.