The Vampire of the Blue Moon

Luna aka Vanitas the original Vampire of the Blue Moon may be an all-powerful being who saved two children from certain death from a mad scientist by wrecking his laboratory...but they can't cook or clean worth shit. Naturally, Vanitas (before he adopted the name for himself) tells them off for being so utterly terrible at basic housekeeping. Luna, in their frustration, then throws a tantrum and sulks in a corner like a child despite being an adult, telling Vanitas, who is actually a child, to do everything himself. He does just that, impressing both Luna and Misha with how good he is at both.

Example of:
Lethal Chef