Pffff...The quintessential Mary-Sue.
...Ironically, one event that took place with the original Suzu(The aforementioned Magician Girl), was a spark-off with Marisa. Using the party's tank as the test dummy. (He's the chew toy, and the butt of every joke. It helps that he's insanely durable. And emphasis on 'dummy'.)
Needless to say, Marisa won that one at the time. There'll be a rematch once things actually get started back up again. (Read: When things get properly scheduled)
Needless to say, she also falls strongly into the Heroic Sociopath category, much like Richard from LFG, or Belkar from OoTS. But with an added helping of Vaarsuvius(OoTS).
Though there's more, but that's just a general overview of her personality. (She's also the second strongest 'Fragment' that resides in my mindscape.)
(She also has a strong dislike of most Crow Tengu, given their typically arrogant and cocky nature.)