elder sister (respectful or as a form of endearment)

yearning; longing / admiration; adoration

long for, yearn for, have a romantic notion of / admire

elder sister

superior; worthful; valuable

older sister

(chiefly women's speech) first person singular pronoun: I, me

expensive (たかい) / worthful, precious (たかい, とうとい, たっとい) / superior, aristocratic (たかい, とうとい, たっとい, えらい, あてやか) / to esteem (とうとぶ, たっとぶ)

(archaic) added to nouns related to people to indicate superiority / (archaic) added to nouns to indicate respect and possession: your

added after nouns related to people to express love and respect