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 group of onmitsu, government-employed undercover agents, established by the 8th Tokugawa shogun, Tokugawa Yoshimune (1684–1751). Sometimes described as ninja.