half-Panda. Yin and Yang's biological mother is never seen or mentioned and no explanation is given for her absence. Villains The Night Master (voiced by David Hemblen) – Billed as a "Dark Overlord in an Evil Class All By Himself", the Night Master is a very powerful and dangerous foe who was responsible for the near extinction of Woo Foo by eliminating all of the Woo Foo knights except for Master Yo. He tricked the world into thinking Woo Foo is dumb and giving it a bad reputation to prevent anyone from learning it to be use against him. The Sensei managed to turn Night Master's army to stone and sent him into hiding for a hundred years until he tricked Yin and Yang into using Woo Foo in order to free his army. The Night Master appears to be a demonic sorcerer bat (as such, he hates light) of some description and has a liking for "gothically" ostentatious outfits. The Night Master is very intelligent, though his plans typically fail because of the stupidity of his minions and his own ego gets the better of him causing him to underestimate his enemies. Another reason of his downfall was because if he had killed Yin and Yang at the start, he feared that Yo would train another group of Woo Foo warriors that would be more competent than the two and he was waiting for the right moment to kill them and Yo at the same time. He is considered to be the actual main villain throughout the series, even though Carl appeared in most of the episodes, while Carl was the main villain since the first season. As revealed in "The Pecking Order", he is one of an eternal line of Night Masters alongside Eradicus and an unnamed cobra-like woman. His real name (since "Night Master" is a title) has not yet been revealed. Ever since his defeat, the other villains have been developing their evil in an attempt to become the new Night Master. Also since his defeat, the reputation of Woo Foo is slowly recovering. It is stated that if the series had a season 3, Woo Foo would have many Woo Foo students and thus completely undid the Night Master's years of planning. Night Master's appearance is similar to Aku of Samurai Jack fame and Hades from Hercules. Grizzleflavin (voiced by Jonathan Wilson) - The gargoyle