Ok, I have a theory about Korra’s parents!
Ever notice Senna’s engagement necklace? Me, neither!
Ever notice Tonraq’s necklace? Me too! Plus it’s highlighted on the character profiles!
My suspicion? Senna broke tradition and proposed to Tonraq instead of the other way around.
And that’s why they live in a tiny South Pole village where she’s from instead of the North Pole where he’s royalty.
Yes, that is officially my headcannon :p