When was the last time we had a genuine non-human Rider? Maybe not even half-Kaijin.

Not too long ago actually:
https://static.zerochan.net/Kamen.Ri...ll.3433398.jpg
And this doesn`t even take into account that Ace has never been an ordinary human, and Houtaro`s father is a shady person. But there definitely weren`t any aliens as the main riders yet.

Maybe, beneath Shouma's organic exterior, he's actually a robotic lifeform like the Cybertronians... and Bundorio Bunderas and Byun Diesel, haha.

Would the Den-O imagins count too? And then maybe Ginga. Desast I think could fit in ever since Outsiders.

That's one of the reasons why I like the Saber x Ghost crossover, as it puts Saber's and Desast's rivalry in the foreground for a few minutes.

If he's an alien or mutant, then I guess those talons on Gavv's boots.... Are Shouma's talons?

We haven't seen his legs yet, so it's entirely possible. Which makes me wonder: Is Gavv testing the waters for the main rider without a human form?

It reminds me of a stoma, sort of an artificial organ for people with certain medical conditions. Not sure if that's got the same name in Japanese, but that's surprisingly fitting for this dude's name, Shoma.

And oh my god, the hoodie has a pouch, has he been a kangaroo this whole time?

Plot Twist: The rider is actually the driver. It's a KRANG situation :lolol

If the belt does turn out to just be an organic part of Shouma, I guess that means that his suits are still just his body and not an in universe "suit" huh?

This is tricky considering they require different gochizo to create. I think it?s closer to talk about a symbiotic organism, like a lichen. Although the element with eating is more about parasites. I think Annuga's idea of ​​an artificial organ is close to the truth. In general, there are many ways with this concept and all of them are unusual and new for the franchise.