Certainly.
And that's exactly what we were "promised" back when they announced the Egi glamour system, which would've allowed us to change the summons we currently had with the ones we were missing (even if it was "cosmetic").
Just a shame they never expanded upon it since its original release...which (by the way) we're looooong overdue.
Like SEVEN (EIGHT?) YEARS OVERDUE, in fact.