First the comic…
Two lessons here. Maybe three.
- First: first panel. She’s actually asking “Who is it?” That’s correct. “Who” is the subject of the implied sentence.
- Next: third panel. He misstates her question, but “whom” is okay in his sentence. “Whom” is the object of the preposition.
- Finally: Her displeasure is appropriate, I suppose, but she should have used “who” because it’s the subject of the sentence.
I guess the moral is to be careful about whom you play video games with.