(figuratively, historical) young military aviator

sea eagle / (figuratively, historical) naval aviator

Alternative form of ひしゃげる (hishageru)

(verb suffix) mistakenly leaving something in a certain state

(honorific, formal) desiderative of する (suru, “to do”): I would like you to do

(informal) gross; creepy

in that case

small fragment or piece of something / someone or something belonging to a certain group or category, but otherwise nondescript and not worth attention

stepping stone

半年: half a year; half-year