close friend, bosom buddy / crony, chum

小磯: a surname

酸素: oxygen

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

Synonym of 酸素 (sanso, “oxygen”)

complainant; plaintiff; accuser

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness

(formal) first-person singular pronoun: I, me

personal, private / secret