King Yemma is a Dragon Ball Z character. He is large and somewhat comical. His crown is his viking helmet.
King Yemma is a giant red oni who decides and judges whether the ones who die go to Heaven or Hell, he also has the authority to allow beings to keep their bodies however this is only allowed to worthy beings such as Goku. Other than Goku he is the only being to have trained under King Kai successfully. He is somewhat of a comical character and he is one of the many people to witness the effects of the powerful being called Janemba, Janemba traps King Yemma in a barrier which can only be broken by swearing at it which Pikkon later discovers and King Yemma is eventually freed from the barrier.
King Yemma is first seen in Episode 4 (Chapter 205) when Kami is taking Goku to the check in station after he got killed during the battle with Raditz. Kami asks King Yemma if Goku can train with King Kai so he could defend the earth in 1 year when the Saiyans arrive, King Yemma looks at Goku's record and sees that he is qualified to train with King Kai and allows him to travel through Snake Way so he can make it to King Kai's planet to train. Later King Yemma is seen admitting Dabura to Heaven because he states that Dabura would enjoy Hell a lot. After he is seen talking to Baba so she could send Vegeta to earth so he could help fight Majin Buu and King Yemma accepts and allows Vegeta to help against Buu. When Majin Buu is defeated Goku asks King Yemma for a favor and that was to reincarnate Buu into a good person so he can later fight him and King Yemma grants Goku's favor and Uub was born due to this.