I was thinking maybe heroes of lore like Siegfried/Sigurd or Yamato Takeru, both dragon slayers of their own respective lore with Siegfried having slayed Fafnir, and Yamato Takeru having slayed Orochi.

You might have something here...

I mean, I was joking with Kamen Rider Saver, buuuuuut...

The Fairy Tale theme potential also hit me along with a Fantasy D&D-esque theme. Saber being the knight stand-in while other riders represent other roles. Bard, fist-fighter, mage, archer, cleric, etc.

So look like the show will be fairytale or fantasy books? Interesting.

I guess the main character must be either book-lover or have a thing for collecting books.

I will give this show a shot.

Yeah, though I am still open to the possibility that it could be a show where the protagonist rider is a Japanese-themed rider like Gaim or Ghost. And while the kanji and obvious wordplay they got going on still has me convinced that it is possible, it could just be for decorative purposes like Blade did in its title and they could give us a Medieval Camelot-ish looking rider. Either way curious to see where this all leads to.

The book thing might be the henshin gimmick. The belt has a small, what appears to be book like device that opens, well, like a book would and has illustrations and or writing on it. I wonder if the sword handle on the belt simply activates the book by making it open.

if all these speculations about KR Saber being a rider who channels the powers of fictional characters from story books wound up becoming true, i'd love for his final form to be based on his own life story. that'd be neat to see :p

inb4 his base form is some simple warrior or knight, but his final form is King Arthur.

The character that's rendered as a book has me super-intrigued.

More than anything, though, I just want them to carry forward the writing quality that they've brought to Zero-One, Build, and Ex-Aid.