close friend, bosom buddy / crony, chum

不忍: Shinobazu, a Japanese family name

篠笛: Japanese transverse bamboo flute

俊信: a male given name / 利信: a male given name

忍び: doing something secretly, travelling incognito; theft; ninjutsu, ninja

忍び入る: sneak into

discreet, hiding one's identity

a unisex given name / a surname

squirrel's foot fern (Davallia mariesii) / clothing patterned with shinobu ferns / a species of fern, Lepisorus thunbergianus; clothing layers of onion-green on the front, blue on the back

a surname