I have to admit that what I've heard about Mahoranma on this board has left me entirely lacking the urge to track it down to find out more. More generally, watching the Ranma cast interact with someone in the Herb-plus power bracket who's completely sane and reasonable would be...
Dull.
I mean, the conflicts I can think of all involve someone in the Ranma cast contracting one of their periodic bouts of CPSS (Comedic Plot Stupidity Syndrome) and starting a problem of some sort, which Vivio will either ignore or deal with like a polite schoolgirl until it becomes dangerous, at which point she flattens them and the story arc ends. That can only be amusing so many times, unless you want to make it a running gag somehow, and frankly, if you're going to do that OCs or Negima cast members should do just as well.
===========
===============================================
"V, did you do something foolish?"
"Yes, and it was glorious."
Dull.
I mean, the conflicts I can think of all involve someone in the Ranma cast contracting one of their periodic bouts of CPSS (Comedic Plot Stupidity Syndrome) and starting a problem of some sort, which Vivio will either ignore or deal with like a polite schoolgirl until it becomes dangerous, at which point she flattens them and the story arc ends. That can only be amusing so many times, unless you want to make it a running gag somehow, and frankly, if you're going to do that OCs or Negima cast members should do just as well.
===========
===============================================
"V, did you do something foolish?"
"Yes, and it was glorious."