King Sei

King Sei was a king who ruled the region that includes Shrike. He was buried in Sei's Tomb with the Fighter Ring.

Riki's Quest
Children in the playground in Shrike lead Riki to Sei's Tomb. Riki gathers the Magatama, Murakamo Sword, and Mizukagami Shield and places them on pedestals. When he goes to the coffin, it opens and Sei awakes in his undead form. The rings communicate, and Sei gives Riki the Fighter Ring and joins the party.

Other Quests
The other characters must place the Magatama, Murakamo Sword, and Mizukagami Shield on the pedestal to access Sei's chamber. Once they awaken Sei, they must fight him and some Dead Knights. Once they win, Sei offers the Kusanagi sword or joins the party.