I wouldn't have thought of it, but yeah, Mahiru definitely has the "charge ahead! make a plan later if at all!" attitude so emblematic of the Gryffindors.

I think the problem Naegi has with Gryffindor-sortings (Gryffindortings!) is that even Joanne Rowling had a tendency to define "Gryffindor" as "the good guys". And Naegi is quite definitively the good guy.

Junko puts on the Sorting Hat, the Sorting Hat EXPLODES.