close friend, bosom buddy / crony, chum

姫: princess / 媛: beautiful woman, princess

姫: prefix expressing cuteness or smallness

悲鳴: scream, shriek / 碑銘: inscription, epitaph / 非命: unnatural or untimely death

秘める: hide, keep feelings or thoughts inside

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

(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