The two of them would then get married, and would proceed to fight Mokou together. "Know your place, mongrel! Your fire is nothing compared to the might of a true King, and the immortality you bear is nothing but a lie. The likes of you don't even deserve to work under me. Disappear, now!"
But Berserker was running in the forest and they have a 2vs2, yay.
What if Rinnosuke could danmaku and went to defeat everybody?