OOC
Backtagging: I will backtag into oblivion. Come at me bros
Threadhopping/jacking: This is fine with warning
Fourthwalling: Please warn me ahead of time.

ACTION
Fighting: This is fine
Injuries: Likewise fine! I'm wide open.
Killing: This would require extensive plotting, but open to this as well.
Telepathy/mind-reading: Go for it!

RELATIONS
Hugging:  A-ok
Flirting: Likewise A-ok, but should her brother ever catch wind of it....
Kissing and/or other intimate actions: With development yes, I'm open to it. but the above warning comes along with it ;D

Anything else you'd like to make known? She really should come with an "over protective and very jealous brother" warning.