How are alternate_form characters counted if they’re present with their other forms?

Example: post #3503260
Is that 2girls or 1girl multiple_views?

I'd say 2girls, since they're interacting with each other.

Should dual_persona also be tagged?

I have to agree with Eagle, if they are interacting with each other like the above count it as a separate character for gender counter tags, if it's in something like a character sheet tag it with multiple_views instead.