|Skills and Powers||Controls dreams|
|Manga||Waking to a Nightmare|
|Anime||Walking to a Nightmare|
|OVA||Inaba the Dream Maker|
|Movie||Urusei Yatsura 2: Beautiful Dreamer|
|Japanese VA||Takuya Fujioka, Kenichi Ogata|
|English VA||Draidyl Roberts|
Mujaki (夢邪鬼, Mujaki?, A demon that controls the dream) A short little dream demon dressed in red with a top hat and little black spectacles. Created an alternate reality in which Lum, Ataru and the others were all trapped inside. Has overwhelming control over manipulation of dreams into reality, but his dreams almost always turn to nightmares. His cohort is the pig-like Baku, which to my recollection is an actual mythological creature which is said to eat dreams. Mujaki is a recycled character from one of Takahashi's earlier Urusei Yatsura stories. But he's a lot more powerful and sinister in this movie than the character he was based on.
- First apears in chapter Waking to a Nightmare
- Before the movie he appeared in episode 21
- After movie he appeared in episode 173
- He cameos in the OVA Inaba the Dream Maker attending Ataru and Lum's wedding. He is seen crying and standing next to Elle. Also when Cherry takes a group photo of the wedding ceremony, he was also the on background.