Headcannon that McGonnagl was always protective of the Next-Gen Wotter clan such as...

McGonnagl: Mr. (Albus) Potter, where's Mr. (Fred) Weasley?

Al: doing the thing

McGonnagl: and Mr. (Teddy) Lupin?

Al: stopping Fred from doing the thing.

McGonnagl: and Mr. (James) Potter?

Al: stopping Teddy from stopping Fred from doing the thing.

McGonnagl: and Ms. (Rose) Weasley?

Al: laughing at the thing.

McGonnagl: and why are you here?

Al: well, I'm supposed to be distracting you, wait no! Don't walk away! They're trying to cheer up Rose!

McGonnagl: *stops in her tracks* why is Rose sad.

Al: *hesitantly* her boyfriend broke up with her and called her the m word.

McGonnagl: *whips out wand* WHO WAS IT!?!?!

Al: 0_o um, Lorcan Scamander.