You're not that weak, and he's not that strong. You can take him on.
And even though most of your quote-unquote reinforcements' capabilities are unknown, they're bound to be useful in some way, and quantity's still a great advantage.
But before any of that, you have to say something very important.
It’s been nagging at you for a while now.
You expected a hissy fit, not this confidently nonchalant response.
Intimidation tactics seem futile here, but really, you're just buying a little bit of time until that kid gets to safety.
That means you can finally start kicking his ass safely, this damn arrogant pirate.
Kaji might think he's doing the noble thing by avoiding damage to his subordinates, but he's just being stupid if he really thinks he can win this alone.
He's not as hostile as your previous opponent was, though.