What would be a good tag for when a character is resisting/resistant to hypnosis? I only ask because of this picture: rule34.xxx/index.php?page=post&s=view&id=3632600

Pretty obvious the dude was trying to hypnotize her and failed.

Well, there's always {{failed_hypnosis}}. There are several pic in it with no sequel, and one in particular where failed hypnosis has been discussed and kind of allowed to stay up: hypnohub.net/post/show/68818/

I don't think there's a tag that specifically applies to the character however (not counting character tags). It depends a lot on the situation, and as there are also many pics here of Juri hypnotized a tag that denotes actual immunity would be inappropriate IMHO.

Just fyi, questions about tags should generally be posted in <<hypnohub.net/forum/show/51288|the Official Tags thread>>. Gotta say though, I feel that one (and a few others, such as the hunting thread) definitely deserve being stickied at this point. It's not surprising new users, or those unfamiliar with the forums, don't use them if they're not visible.