Backtagging: Please do.
Threadhopping: Go for it, unless it's a private thread or otherwise inappropriate to gatecrash.
Fourthwalling: Probably not. Ask first.
Offensive subjects (elaborate): Clearly label any sensitive or NSFW content and we'll be good. I prefer to avoid graphic descriptions of gore, (nonconsensual) sexual violence, and animal abuse.
Physical affection and flirting with this character: Yes. Whether he's receptive or reciprocative depends entirely on what kind of CR he has with the character in question.
Assumed CR with this character: Yes, but I'd like to work it out first before jumping into things.
Fighting with this character: Yes, if it's relevant to the thread in some way. Archie's more likely to avoid physical violence whenever possible, so probably won't stick around once fists are flying.
Injuring this character (include limits and severity): Yes. Anything that makes sense within the context of the thread. But I'd like to discuss it beforehand.
Using telepathy/mind reading abilities on this character: Maybe, ask first.
I'll do my best to respect others' preferences if I'm aware of them and will label any potentially triggering content, so please mind the headers. If you have any concerns don't hesitate to PM me. I'm open to interacting with OCs and canon characters from any medium. Character and player are both over 18.
If for any reason you wish to opt out of tags from me, feel free to tell me.