[Albert Moulton]

Please use a converter.

If I read the action right, then somebody open raised from MP for 5bb, then it was folded to hero with AKo in the blinds who folded.

In general, I would recommend reraising to 15bb, and if called by the original raiser and no one else, then betting at least 20bb at any flop as the default play. Occasionally, in the same heads up post-flop situation after you reraise, check/calling the flop when you hit top pair and leading the turn can be good too.

I would not recommend just folding except that you said, "player is playing 40/2 over 100+ hands." I still think reraising and leading the flop is pretty good. But folding vs a guy with a 2% pfr probably isn't terrible.

I wouldn't just call.