[Den-O]

I just don't know that I could ever choose between the 2. For the same reasons that both Switchblade and Matrixbeast stated I would have to pick Ren and Shinji. They are arguably the best team of main/secondary riders ever. What one lacks the other has. They are a perfect balance to each other. I love Ren for being a complete badass, never giving up on his goals, and always making the tough choices. And I also love Shinji for that goofball heart of gold that he has, his inexperience which makes him relatable, and his overall personality.

Ryuki had the perfect balance of characters to love or hate all around. Ren and Shinji are just the shining example of how to do the Rider 1/2 thing right. So right that I think most people would have a tough time choosing between them.