I have a feeling that there's might be a running comedic gags for Gou Shijima/Kamen Rider Mach since he is a photographer.

His running gags is trying to catching a perfect picture but he always missed it.

I hope so.

I would wanna see him get involved with fighting Chase and how they'll combine their bikes.

It just occurred to me since Mach uses motorcycles; I wonder if he can actually take control of any type of motorcycle? Maybe that's how he get's Machine Chaser's bike to combine with his?

Could be. The Behind the Scenes pics made it look more like they would work together though. Really wanna see how this will turn out.

I think he may befriend Chase since Chase is a loner and Gou is a cheerful guy.

Maybe Gou could make Chase a heel-face turn when Chase found out the truth about himself

So, combing through hundreds of posts isn't fun, so sorry if it has been said.

I feel now, more than before, Chase isn't really a Riodmude. He doesn't kill humans, and needs a henshin device to transform. The other Roidmudes evolve, but not Chase. I feel he forgot he as human, and believes he is Roidmude, and he really is Proto-Drive. That's why he couldn't hurt what's her face.

So, that is my theory? Is it right? Who knows.

Also, so happy with door gun. Thank you for having the door actually open. I can't wait to see more car part weapons.

That's... exactly what I was thinking. Finally someone says it. (Someone probably did but I most likely didn't see it)

Mashin Chaser's last line of the episode tells me that, and sells it pretty hard for me that he isn't a Roidmude.

That's what I think too.

I feel that Heart and Brain used their powers to make Chase have a change of heart and mindset, and Chase got exploited for their benefits.

The bad guys (sorry Medic)
https://pbs.twimg.com/media/B4BSYFrCMAIu1sK.jpg