How Does FluentCommunity retrieve a user's First and Last Name?

What code does FluentCommunity use to retrieve a user's first and last name? I mean the names that FluentCommunity uses to A) pre-populate the "First Name" and "Last Name" boxes on the Edit Profile form, and B) shows as the author on comments, replies, and chats.

I suspect FluentCommunity may get them from either (or both) the usermeta table and/or the fcom_xprofile table, but I'm not sure.

I'm trying to find a way to keep FluentCommunity from exposing my user's real first and last names. Ideally, the Edit Profile form would have a single "Display Name" field instead of the way it is now--a "First Name" and "Last Name" box that saves to the fcom_profile table (but is (weirdly!) pre-populated from the usermeta table).

I'm attempting to code a way out of this problem, but I'm a beginner coder, so any help you can give is appreciated.