The Miyoshi brothers have powerful regenerative capabilities.  They say that taking life is offering salvation, and in them Shungiku sees his own younger self.  Oooka, who knows the old Shungiku, is doubtful he can win the battle.
So Princess Naa herself is 
beneath Wakayama Castle.
¿Así que la Princesa Naa se encuentra en 
los subterráneos de este castillo de Wakayama?
¿Dices que la princesa Naa se encuentra en 
los subterráneos del castillo de Wakayama?
Então a própria Princesa Naa 
está no Castelo Wakayama.