The battle with Kai reveals secrets that the Nagatsukis would rather leave unknown.
who were slain by the 
paper umbrella at the time.
وهما اللّذان قُتِلا على يد المِظلّة الورقيّة آنذاك
wo sie vom Papierschirm getötet wurden.
che sono stati uccisi dall'ombrello di carta.
que foram mortos pela
Sombrinha de Papel.