I'm surprised anyone would see Fel this way after the last update, which isn't, I think, shy about the idea that, behind the meticulously cultivated facade of carefree hypersexuality, her greatest desire is a genuine connection to a complete person, not merely their body.
I won't speculate whether love will enter into the equation down the line, but if it does, Fel's probably the person best suited to make it something lasting and meaningful.
Also, let's not bring up the age gap here. The Protagonist might be twenty-something by measure of his birth certificate, for obvious reasons, but by measure of emotional maturity, introspection and self awareness, he's well into his thirties.