It is orange and has the face of a cat. When it was freed his body resembled a Squid Khan's.
Hundreds of years ago the nine Oni generals were sealed in masks, where they were helpless and could not use their powers.
In Fright Fight Night, his mask was fond on top of a mountain. The Enforcers tried to stop Jackie Chan from taking it to Section 13, but failed. Later on Paco put the mask on to look scary for a Halloween competition. He removed it himself at the end of the episode with the use of a Japanese octopus' tentacle.
In Ninja Twilight, after the nine masks was joined together, all of the Oni generals were freed and tried to destroy the world. Number 6 was walking with Number 2 to one of the four corners of the earth. They were briefly defeated by Uncle and Tohru but Tarakudo managed to capture them. After Jade put Tarakudo's mask on his face, all the Oni and Shadowkhan were imprisoned within.
- Ninja Twilight