Mu

Mu is a black cousin who was introduced in Me and My Katamari. As of December 28, 2009, he has won the Cousin of the Week poll 1 time. His name is possibly a reference to it's trnaslation, of "nothing" or "no", giving his black, blank appearance.

Me and My Katamari, Beautiful Katamari, and Katamari Forever
A second cousin who likes black clothes. He makes it a rule to always keep his promises.

Katamari Forever
A second cousin who likes black clothes. Not so good at making friends, but he always keeps his promises.

Me and My Katamari
Level: Banana City

How to Find: On a hill, in the center. He disappears if you don't roll him up quick.

Beautiful Katamari
Level: Seadome

How to Find: Out by the airport in the middle of a lake.

Katamari Forever
Level: Farewell!

How to Find: There is a random item on the floor. Roll that up to make the next appear. Do that five times and then Mu will appear where on the floor.