Rate my hinata

I used to run a build like this on Alfonse but with his legendary weapon.
I'd say this Hinata is decently good due to my experience with the similar build. :) Just watch out for mages.

I'd personally switch Renewal with something else since you don't really have anything that benefits from having more hp, like Quick Riposte, and it's not Renewal 3 which would activate every other turn.

While his speed is workable, I wouldn't recommend investing too much into it. You're using your Sacred Seal slot to boost up his speed, but it's not really doing much for him. Hinata is good in HP, for ploy, attack, and defense. I'd personally remove the speed seal and put something on him that would bolster his defenses, like Close Defense.

For his assist skill, I'd use a movement skill, like Reposition, Draw Back, etc.

For his B, I'd change that to either Seal Attack (my preference) or Quick Riposte.

For his C, that's flexible, but I'd give him Panic Ploy because his HP is really high.

And, again, his S could be Close Defense to tank melee reds/greens, or Distant Defense to tank Dagger and Bow units.

Just my opinion.