妹いもうと君ぎみいもうとぎみじ字FuriganaMeanings1noun(younger) sister (honorific)honorific or respectful (sonkeigo)›dated termHonorific term for someone else's younger sister. Dated and now mostly replaced by 妹さん in modern speech, but still encountered in historical or formal contexts.お手て紙がみで妹いもうと君
