Rentu

Rentu  is Pen Chi's assistant and most loyal Ninja.

Background
Rentu, as a little penguin was odd, playing with black pieces of cloth and tying them around his waist. He heard rumors of penguins who were Ninjas, and Rentu was exicted. This was something he had wanted to do all his life. He joined at the dojo, where Pen Chi was ninja master. He trained under Pen Chi, until he was a ninja also. Then LiquidFence happened, and Rentu followed Pen Chi into hiding along with the Ninja army. He became Pen Chi's most trusted advisor.

Involvement
Rentu is Pen Chi's advisor, he acts on his behalfd and is more sensible then Pen Chi most of the time.

Trivia

 * Rentu is younger then he looks
 * He is disgusted by Pen Chi's yellow snow eating habits
 * He was the one who found the secret Ninja Base