minus's unseen mother is the real Goddess of the universeminus's mom is the only one seen to actually be able to keep her in line, and the few times minus has tried to trick her, her powers haven't worked out that well. When minus got sick for fun, she made sure that minus knew exactly what being sick is supposed to feel like. She married a nice man a decade or so back and had a child. She generally just lets minus keep to her own devices like a normal girl. When minus accidentally destroyed the world, she pinched the bridge of her nose in irritation, ignored her husband's laughter, and made minus go to meetings to fix her mistakes. Occasionally we see one of the other divine existences in that world, like Larry, who's doing fine, and the odd man in the red suit. Her name is nought. (Her husband's name isn't negative deuce, that's a common misconception.)
minus is Haruhi Suzumiya.Do I really have to explain this one? I was waiting for this strip to get a WMG page just so I could add it. Alternatively...
minus is Haruhi Suzumiya's daughter.This combines the above two Epileptic Trees, and makes a bit more sense than minus herself being Haruhi.
The red-haired girl minus sent back in time accidentally is her ancestor.That's why minus couldn't change her back— doing so would cause a Temporal Paradox.