How do you yume a character you hardly even know is my question. I mean I guess you can read their lore on a wiki specifically but. Getting to know their universe helps you understand them more overall. How they interact with certain types of people, what kind of situations elicit what sort of reactions from them, etc

no idea

I don't really think it should be. A lot of people are watering down the term of yume already. Just call yourself a self shipper if that's the case

idk man im a nonsharing yume with uh classified info