Save attached. Engineer will see that both characters have 7560 HP as applied with the trainer. Walk forward to trigger a battle. After battle, HP for Van will revert to 756 and Agnes to 402 (or 488 if she levels up due to XP multipliers – use "weak enemies" cheat to avoid battle going on to long and accumulating multipliers) . Same thing happens to stats other than HP, but that's just the easiest one to check!
where do the saves go?
%USERPROFILE%\Saved Games\Falcom\Kuro