Dude, Green Bell for debuff! I'm giving her a long, hard look myself though.
(no, not that kind of look... b-b-baka)
You can probably go with any bloomable girl. Old school like Toad Lily or vanilla
(pun intended) Chocolate Cosmos, or new school like
Laurentia perhaps? Of nonbloomable ones, Japanese Iris, Pitahaya, or Miko Anemone above.
If you're a fan of "random strike" skills, Kale and
Lily come to mind. Both go with skill activation up at least, so they should be good as well.