Warning: Spoilers for Dragon Ball Daima, episode #6Dragon Ball Daima has been exploring many new corners of the franchise's lore, and the Supreme Kai himself was the subject of the latest lore drop, revealing his origins. However, the answer to where the Kai came from is quite a bit weirder than anyone could have expected.
The Supreme Kai, Shin, is a godly being who watches over Universe 7, and each universe has its own Supreme Kai to handle its day-to-day affairs. He first appeared during the Buu Saga, worried about the danger that Majin Buu posed to the universe (and rightfully so). Since then, Supreme Kai has become a fairly significant character, and his importance has only grown with his starring role in Dragon Ball Daima. Daima had already revealed that Supreme Kai was but one member of his race, who apparently originated in the Demon Realm.
The Supreme Kai's Species Come From Trees
The Glind Have an Unusual Method of Reproduction
The Supreme Kai comes from a race native to the Second Demon World, known as the Glind. While flying on the plane, Panzy asks the Supreme Kai if it's true that Glind are born from trees, which he confirms. He explains for Goku's benefit that the Glind are born from one of a handful of special trees on very rare occasions, every hundred years or so. He even goes on to state that, since Degesu came from the same tree as him, they're technically considered to be siblings, despite Glind not having actual male or female sexes.
Some of this information had been stated by Toriyama in interviews in the past, but it's still excellent to have the lore surrounding the Supreme Kai made canon in the anime. Since Goku's journey will take him and his traveling companions to all the Demon Realm worlds, it seems inevitable that the group will make their way to the Second Demon World and give Goku a chance to see these Glind trees for himself. One can't help but wonder if Supreme Kai may have a bit of nostalgia for his old home, which may well come to the forefront when they visit.
Of course, there are still a lot more questions surrounding the Supreme Kai. How exactly did Shin become the Supreme Kai in the first place? Was there some sort of selection process, or was he somehow destined to become a Kai? It's indicated that most of the Glind left the Demon Realm a long time ago, but some, like Degesu and Arinsu, remained behind due to being at odds with their fellow Glind. Did the Glind bring their trees with them when they left?
The lore surrounding the Glind and the Demon Realm in general has been fascinating, and it's certainly amusing that one of the most godly beings in Universe 7 is from a tree in the Demon Realm. Dragon Ball Daima will no doubt continue to reveal important information about the Glind and the Supreme Kai's past as it becomes relevant, offering a treasure trove of new lore for the most dedicated fans.

Dragon Ball DAIMA is the fifth overall series in the action-adventure anime franchise. It features most of the classic cast as de-aged versions of themselves, including Goku, Vegeta, and Bulma. The series was announced at NYCC 2023, with creator Akira Toriyama returning to handle DAIMA's run.
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