Two points involving these tags.
First, biribiri, I have no issues with its existence, and its well defined and implemented, but should it really be a character tag?
Secondly, should genderswap be applied to senou_natsuru? We discussed this earlier concerning Ranma, and while I didn't chime in there, I don't think "canon" genderswaps should be tagged that way, instead if they are numerous enough, the versions should get separate character tags, as is done with Ranma. I don't know if Natsuru has enough tags to qualify, and will most likely be overwhelmingly depicted as a girl.
Updated by richie