DSRPG3 is being made at a time where swordsmith village is being released, so that gives higo the possibility to make most of the breathings REALLY accurate.
I suggest that you go for the canonical look on breathings. Just to make it anime-adjacent in feel. I have faith that regardless of what direction the team goes it'll be good, just my thoughts.
I do have a question for devs though.
What is the plan for form numbers? I know hantengu is gonna have like 20 moves or some shit, so does that mean that all breathings will get all canonical forms? (For example, all 10 water forms, all 6 [or 9 if you include zen's] thunder moves)?
Anyway, that's it from me, peace!