Hatsune

Hatsune (初音, 発音, はつね) is a character mentioned in Kabanari of The Iron Fortress, she is the younger sister of Ikoma.

Personality
Although not much of Hatsune’s personality is known, (through flashbacks) she was shown to be a cheerful and sweet-natured young girl who loved his elder brother dearly. She appeared to believe in good fortune as upon finding a turquoise pebble, she insisted that both her and Ikoma should keep one each as ‘good luck charms’

History
Hatsune was born in Hinomoto, where she grew up alongside her loving brother Ikoma. One day, the siblings found a pair of turquoise rocks located near a lake, Ikoma initially offered her to have both of them, however, Hatsune insisted that they both kept one each as ‘good luck charms’.

Trivia

 * The name Hatsune consists of(初 hatsu) meaning 'first' as well as (音 ne) meaning 'sound'.