Backtagging: Yes, I will backtag forever
4th Wall Breaking: No for now
Kissing: Sure, but asking her first is always appreciated and will lessen the risk of a punch
Injuring her: If it's not serious that's fine, more serious things I'd like to know before hand
Killing her: ask first, I'm not against character death but I don't want it out of nowhere
Mind reading: Go ahead, ask and I can give you more info.