Maya Erskine

as Mizu

George Takei

as Seki

Masi Oka

as Ringo

Randall Park

as Heiji Shindo

Brenda Song

as Akemi

Darren Barnet

as Taigen

Kenneth Branagh

as Abijah Fowler

Cary-Hiroyuki Tagawa

as The Swordmaker