[DrillBIT]

Kind of odd isn't it.
Gaim's temporary upgrade requires the Genisis driver, while the actual upgrade requires the gun and not the Genisis driver.
The armor for Gaim's upgrade is Kachidoki Yoroi (armor), which doesn't seemed to have anything to do with fruits (unless they forced to make it into one).
Final form comes in in the middle of the show isn't something new.
Kachidoki Arms sounded like his final form already, but I think there could be one more step following that (all 4 main Riders getting their final forms, and Gaim needs to stand out from them).




(Able to use any lock seed)




(Kachidoki Lock Seed has an extra attachment port for future upgrade)




(Big sword. Longer after adding orange sword...)