Sen & Ryo

Sen & Ryo are minor villain in the video game; Okamiden, which is the sequel of Okami.

Sen
Sen resembles a large bird, presumibly a crane. he wears a Kimono that's somehow merged into his wings.

Ryo
Ryo is a giant turtle. He wears a robe that somehow is behind his shell.

Okamiden
Both Sen and Ryo are demons that are interested in human souls. When Chibi started to meddle in their affairs, Sen and Ryo fight Chibi and Kagu.

Boss Battle: Sen
Sen is the first one to fight Chibi and Kagu. Sen fights in a giant puppet known as Renjishi. This puppet uses can use it's fints and wind based attacks. After it gets stunned, Chibi slashes at it's weaks spots; it's cogs. This causes Sen to retreat, and forcing Ryo to fight Chibi.

Boss Battle: Ryo
After Sen is defeated by Ryo, Ryo takes over in the Renjishi puppet, and does pretty much the same thing as Sen. After Renjishi gets stunned again, Ryo warned Chibi that Kagu is on his shoulder, and if he tries to slash Renjishi's weak point it could kill Kagu. So Chibi decided not to hit the weak point, instead Chibi found another weak point, Renjishi's palms. After he's stunned Chibi rescues Kagu, and Ryo disappears.

Boss Battle: Sen & Ryo
Despite both of them getting defeated, both Sen and Ryo reappear, reveal their ultimate puppet, and fuse with their puppet. Just when they are about to kill Kagu, Chibi intercepts the attack barely hanging on. With this act ou kindness, Kagu unleashes her power and destroys the ultimate puppet, killing Sen and Ryo.