THREADJACKING - Perfectly awesome and welcome always, as long as no one gets left out.
4TH WALLING - No thanks.
BACKTAGGING - Heavily encouraged! Everyone gets busy sometimes, so I totally get it. ♥
MIND READING - Ask for specific permission beforehand, please!
FIGHTING - She's not really the type, but if you can think of a reason
MAIMING - Please ask beforehand!
KILLING - I'd really rather not.
KISSING - .Fine by me, but Franziska'll kill you.
HUGGING - See above.
BADTOUCHING - See above.
RELATIONSHIPS - It would take a long time, and probably a lot of suffering (and whipping) on the other character's end. But if your character is masochistic enough to want to do that to themselves, then by all means, yes!