You’re missing my point. It isn’t the multiple narrators. It’s the multi narrators that have consistency yet simultaneous uniqueness to the narrator.

So Mina Murray’s narration does a voice for Van Helsing that is the same cadence and tone as when Jonathan Harker’s narration does a voice for Van Velsing, but not only are both these voices consistant they sound unique to the respective narrators (Harker’s impersonation of Van Helsing vs. Mina’s) but this is also done for Harker’s version of Quincy, Van Gelding’s version of Quincy, Mina’s version of Quincy, Harker’s version of Lord Godalming etc.

It’s really amazing and honestly unnecessary but really adds to the cohesion as the multiple narrators can make the various characters easily get lost in the older English.