"What do you need boy robes for?" inquires Madam Malkins.
"I'm sometimes a boy," the girl explains.
"What?"
"Look—"
"Is it actually? Why? You could be looking into – okay but is this a short-term priorities list or are these goals just – just, why?"
"I didn't say your conclusions about my priority orderings were wrong, I said your conclusions about me were wrong, and also I'm a Slytherin, I won't just tell you my plans."
"It's a me thing! I'm a metamorphmagus, I can change my body however I like!"
"… You're still human though, right?" Pause. "Oh, or are you another sapient species – I saw, what are they called, uh, goblins."
"Huh." Pause. "Just magical humans or are there also magical other – okay I guess it might depend on the definitions – are there, like, non-human wizards and witches?"
"Uh – wizards and witches are all humans? I mean, I guess you get some people with some magical genetics but, on the whole, human."