[Grimlockimus]

Quote:

Originally Posted by Drifter448

I also think it's Sagara. If you think about it, why would Ryoma abandon his greatest creation (The Genesis Driver)?

Well Ryoma has been shown in the series to be very surprised by the Sengoku Driver's potential for power (Jinba Lemon, Kachidoki etc) and we've seen the power of a Sengoku Driver with the right Lockseed (Yoma) so it's entirely possible he'd switch things up.