Ninja

Ninja is Soto's ally and is an Imortal character.

= Season 1 =

The Water God
Ninja is one of the guards for The King along with Yar. When The Evil King attacks The King he kills Ninja and Yar. While Yar dies traveling to the Afterlife, Ninja becomes simply Imortal. The reason is unknown but it is likely that he has survived as an imortal person to help Soto. Later he leads Soto to Lele, who helps Soto. Then Soto asks who Ninja was and Ninja tells how he was The King's guard and how Yar died and he became Imortal. Then Soto leaves traveling to The Ghast Dimension.

The End
Ninja is seen at the celebration after The Evil King's death standing by Nature God.

= Season 2 =

Ninja's Challenges
Ninja sets up challenges for Soto.

= What Happens To Him = Since Ninja is not seen after that he most likely went to the Afterlife with Yar.