Idea

Yes, you would use the Title Display Name for this:

https://api.playfab.com/Documentation/Client/method/UpdateUserTitleDisplayName

Is there anyway for display names to reflect in PlayFab's online game manager? The players list generally displays only usernames, and even the emails don't show up unless the actual player itself is clicked on.

When you're looking at a player profile in the Game Manager, the "Username" field contains the player's Username, while the "Display name" field contains the player's Title Display Name. On the Players tab, when you're looking at the list of all recently signed in players, the "Name" column uses the Username if one exists (since that's the primary identifier across your tiltes), and it uses the Title Display Name otherwise. Is your request then to have the Players tab contain additional columns of info, so that it shows all three (Username, Title Display Name, and email)?

I suppose that's precisely what I'm looking for! Although email currently doesn't show anything on that list.