Mobile Frame Zero: Shinonome SN-2「騎士」(Kishi)

"After months of successful combat with SN-0s and SN-1Hs, the mechs began to experience a fall from grace as more and more enemies discovered their weak spots. The SN-0 could not operate underwater due to barometric pressure breaching waterproofing seals, nor in low-atmosphere environments, and because the SN-1H could not be transported by air because of its mass, it had to be assembled at ground stations, which were subsequently raided. Shinonome Frame Corporation's next mech, or "suit", as it