I don’t ship anyone else so I don’t care. They are meant to be together. I hope that P5 deals with bringing P3 MC (FeMC for me) back. Hopefully at the end they can reunite with old friends and Akihiko.
My headcanon- When FeMC comes back, Akihiko can finally slow down and put fighting as a defense instead of an offense. They eventually get married and have kids and he joins the force.