Who is your favorite Rider supporting character?
 

Mine is Ankh. His asshole personality works perfectly with all of the other members of the cast.

Mole Friend.

He may not be a rider, but he's still a main character from start to finish.

That's not an easy question to answer since there are so many I like, but my favorite is probably Kaoru Ichijo from Kuuga.

http://i.imgur.com/rjXa1gc.jpg

He worked so well together with Godai and was the best character of the show for me.

I think he was the one who forever set the standard of what a support character in a Rider show should strive to be.

Ichijou for me too. He was my favorite character in Kuuga, and managed to be extremely useful despite not having any special powers. Plus his relationship with Godai is extremely heartwarming. I really couldn't ask for more, I would love to see a character like him again!

It's too hard for me to just pick one, so I'll do a top five (in chronological order):

Tachibana Tobei (OG, V3, X, Amazon, and Stronger)
Ichijou (Kuuga)
Kasumi (Hibiki)
Owner (Den-O)
Ankh (OOO)

I'll probably go with Kengo from Fourze. He worked really well with Gentaro and I loved the relationship the two of them had. It was also really heartwarming to see him grow close to not just Gentaro, but to the Kamen Rider club as a whole.

This. Assuming you mean Mamoru and not the original, at least.

In fact, the whole extermination team in Amazons is just great. I haven't seen any of season 2 yet so that may change, but I hope not.

I do mean the OG mole man.* Mamoru and the extermination team are cool too, but Mogura is just one of my favorite characters in Rider. He was a true hero.

*mole friend being a pun on the fact that juujin is pretty close to yuujin, which means friend, and which i think may have been intentional given amazon's love for tomodachis

Tadogoro and Misaki from Kabuto
Owner from Den-O
Kengo from Fourze
Wajima from Wizard
Kiriko from Drive
Onari from Ghost

Does Gotou count? I liked Gotou's whole arc to becoming Birth but since he actually becomes a rider that's probably disqualified...

I guess I'd have to go with Natsumi from Decade even though yes, she ends up becoming a Rider too.

Ozawa from Agito, Inoue's last good series before his [divorce/ alcoholism / WoW addiction] severly crippled his abilities henshining him into the infamous INOUE ZONE!

Goro from Ryuki - in my opinion, the first gay guy in Rider history. I mean, c'mon!

Reiko Momoi from Ryuki - she's just awesome.

Most annoying:
"TAKUN!! ORPHENOCHUU!!"
Onari
Kivat
Well, nearly everyone in Kiva.

Ankh and Ichijou.

Kengo
Ankh
Asuna

Three way tie.

Well, to add more fuel to your fire that is hate towards Keitaro, don't forget that he had to take a metaphorical dookie on all things precious for his moment of glory in the Faiz Movie Paradise Lost by drinking a homebrew Red Bull of sorts aka the one-shot henshin drink and becoming Kaixa to defend the resistance base against a tough orphenoch, which he succeeded, but the Kaixa belt withered away like a vampire under sunlight. :lolol

Alain from Ghost. Everything about him was awesome.

(Granted I've only seen a couple series, I might still discover somebody I like better)

As Bugs Bunny would say, "Wotta Maroon!"

I have only seen W, Gaim and Ex-Aid, but I just want to say that I'm a big Narumi Akiko fan.

It's funny because the character seemed extremely annoying at first, but turns out to be... Well, still pretty annoying, but in an endearing way (the slipper gags never get old for me!). She's a very brave and resourceful detective-in-training.