The first time Thirteen met Maple and Cinnamon was during his trip to the zoo with his sisters, Remi, and Rhia.
The two gluttons had made the chefs of a restaurant cry tears of blood because they kept eating, and eating, and eating, forcing the staffs to prioritize them instead of the other guests.
Ever since then, the two adorable twins would pop up every now and then to meet Thirteen, whom they called Big Brother.
They even managed to enter the Treasury of the Apocalypse and were allowed to leave peacefully by Metatron.
The God of the Apocalypse even gave them the Skill that would allow them their pockets to produce an unlimited amount of snacks, which were perfect for gluttons like them.
Because of Metatron's stance, Thirteen believed that Maple and Cinnamon were Transcendents.
They were beings that were born in one in a quintillion, making them extremely rare existences in the universe.
And they possessed power that far surpassed the norms.