This is cute... where did I put my insulin...
But if I were to change this, I'd make it so that the girl heard from her parents that Ogres would lie to their victims before eating them so that the loli would always be paranoid while at the same time preparing for death (and maybe season herself?) while Ogre-san just sits there, misunderstanding that she's playing some kind of game because she's a kid and plays along, scaring her in the process but he is too dense to notice, then repeat. Such a missed opportunity cause this gimmick would last very long.