"While playing Majoras Mask you get to know a lot about the mask of Majora"



This isn't true at all. It's an extremely underdeveloped character, since it exists purely as a twist ending. It was used by an ancient tribe for hexing rituals, and it became troublesome (probably meaning that one of them did something that caused it to develop a will of its own) so they sealed it in shadow. Then the Happy Mask Salesman, being the obsessive collector he is, went ahead and found it. Majora's Wrath is also confirmed to be a demon, which would indicate that the evil inhabiting the mask is probably demonic in origin. It's genderless though, as it is just a mask.



Also the evil is purged from the mask thanks to Link, so at the end of the game it is once again just a mask. Completely inanimate. And no, it's not a 'god'.