[Zatyme]

I think one of my favorite touches is that Kiba uses his left hand to operate the phone during his transformation, subtly implying that even though we're supposed to be cheering him one as Faiz that something's off with him and this situation. Granted I also know it was probably done to help differentiate him as a rider user like Kusaka inserting the phone at an angle.

And regarding Mihara as Delta I would say he's the ideal user* due to his lack of desire to even use the damn thing. But the easy time he's had in his fights might also be making him think that this is going to be easier than in actuality to the point that a rude awakening whenever the raw power of the belt doesn't hack it anymore might happen. But it also makes sense he's half-assing it due to just wanting to go home and forget about all these nuts and their issues but now the monsters are stalking and trying to kill him due to the belt.

* compared to Saya being the most efficient user(using the finisher and seeming to just go into a fight trying to end it as fast as possible) and Kitazaki the strongest user (only hampered by never using the finisher due to wanting to make things more interesting/fun for himself)