He and Pochi have been trolling each other for centuries! This level of harassment is cute amateur hour, Irene.
I wonder how he's going to handle this duel? It seems like our MC is just trying to expand his horizons by enjoying different forms of life (which, incidentally, I consider an aspect of his existential journey), so he doesn't necessarily need to keep a low profile about this. That said, it would be the perfect harassment to just refuse the duels.