>>6553594>>6553748>>6553760We could call them Izubuchi's sophisticated renditions of the regular characters. Or call them MSV variants. The Bellvine is known to just be an adaptation of the Billbine, much like what the Hi Nu was to the Nu Gundam.
There are actual MSVs for the Drumlo like the Masaragu, Gadram and Gashim. The Playstation video game featured a few of the MSVs along with Selbine, the mass production Billbine.
However, the Bellvine for the RD has been heavily simplified to match the aesthetics of the rest of the RD aura battlers.
But of course, putting the Aura Phantasm(Sirbine and Zwauth included) guys in a separate shelf is also a valid idea.
Even the Gundam MSV stuff, are usually represented in sophicated Okawara lineart adorned with decals etc and the TV series guys like the GM are Zaku should have more realistic colours(white GM, olive Zaku) when coexisting with the MSV variants.
However, we did have anime styled lineart for the Gundam MSV variants.
