Roy Smith wrote:

ATC only sees some subset of the fields you file in your flight plan. I
don't remember exactly which ones they get (everything up to the REMARKS
section?), but the PIC's name isn't one of them. All that stuff about home
base, souls on board, paint color, etc, is purely for SAR and accident
investigation purposes.

ATC sees the first few characters of the REMARKS, but the string length
is limited. I forget how many characters they see. e.g. if I remark "PLA
FAY", ATC knows I plan to do practice low approaches at Fayetteville.