[SengalBoy]

The only wiki I check regularly was Ultraman, as it seems like it's an effort to make it into a decent encyclopedia.

Anyways I was wondering if Rintaro/Kamen Rider Blades is the first secondary Rider who completely gets along with the main Rider from the start without any sort of friendly rivalry or clash with each other at some point.............. and then I realized that Ibuki is the actual first. I could be wrong though, let's see......

G3 and Agito - Makoto gets along well with Shoichi but G3 considered Agito an enemy first.
Ryuki and Knight - Lol
Faiz and Kaixa - Double Lol
Blade and I really don't want to bring this debate back again - nope
Hibiki and Ibuki - Yup
Kabuto and Gatack - Friendly rivalries
Den-O and Zeronos - Yuto is a tsundere
Kiva and IXA - Similar to Agito and G3
Decade and Diend - Kaito literally attempted to destroy the planet because Tsukasa lied to him
W and Accel - Ryu is a tsundere
OOO and Birth - This is interesting. Date gets along well with Eiji but they did clash during the betrayal, and Gotou is friendly rival to Eiji
Fourze and Meteor - super tsundere
Wizard and Beast - They get along well, but Nitou self proclaimed himself to be Haruto's rival so maybe or maybe not?
Gaim and Baron - Lol. Even though they spend a lot of time in the show working together
Drive and Mach - They get along but Mach did betray them briefly
Ghost and Specter - Typical secondary Rider rivalry
Ex-Aid and Brave - Typical secondary Rider tsundere
Build and Cross-Z - They get along like married couple but often clashes with each other like a married couple
Zi-O and Geiz - lol
Zero-One and Vulcan - Friendly rivalry

So yeah, after Ibuki, probably Beast and Cross-Z, Blades is not the first secondary Rider that gets along well with the main. But man it feels so refreshing to see main and secondary gets along immeidately, however there is a chance that Blades might clash with Saber in the future so who knows?