In that, the characters are animated in a traditional 2D way, while the mecha are done in 3D. For most modern mecha anime, this is pretty common but it’s interesting to see Obari go this route.
Such brutal script editing was probably necessary to cram this increasingly packed story into twelve standard anime episodes ... off his character design. I appreciate Mecha-Ude's sometimes ...
but I feel the reach of that kind of mecha styling is very specific to Asia. Not to mention the character designs and character creation setup seem to be very much to create your own personal waifu.