騎兵: cavalryman

喜平: a male given name

(slang, colloquial) Short for キモカワイイ.

looking skinnier when wearing clothing

to look skinnier when wearing clothing

(Tsugaru) yesterday

(Kansai) to fuck up

(informal, emphatic) Alternative form of しゃべる (shaberu, “to speak”)

擲弾筒: grenade launcher

a prefecture of Japan comprising the western part of 九州 (Kyūshū, “Kyushu”) facing the Sea of Japan and nearby islands; its capital city is also 長崎 (Nagasaki)