1 Death of Insanely Overpowered Fireballs: Clearly you, Choking, are the Id, or McCoy, and you, Hatmaking, are the Superego, or Spock. I’m the Ego, or Kirk.
2 Death of Choking on a Giant Frog: I don’t wanna be McCoy! What a loser!
3 Death of Insanely Overpowered Fireballs: Well we could go for another trio. I’m Harry, Hatmaking is Hermione...
3 Death of Choking on a Giant Frog: That makes me Ron!! That’s even worse!
4 Death of Inhaling Hatmaking Chemicals: ’ow about I’m Granny Weatherwax, Fireballs is Magrat, and you’re Nanny Ogg?
4 Death of Choking on a Giant Frog: Now we’re talking.
4 Death of Insanely Overpowered Fireballs: Hey!

I initially wrote this with Fireballs suggesting: "How about I'm Magrat, Hatmaking is Granny Weatherwax, and you're Nanny Ogg?"

But then I realised nobody would ever make the suggestion of that trio with themselves being Magrat.^[1]

[1] I suppose that continuing to assert that I've never read any of Terry Pratchett's writing would be the height of audacity.^[2]

[2] I like audacity.