I've been reading a lot about how Mother Nature is Pitch's daughter in the Guardian books so I did some scribbles about her.
I like to think that since she controls the weather and seasons, she used to look after the 4 season spirits as Jack Frost is the winter spirit, a long time ago in her grand castle or whatever. But this might have been a bit after Jack "woke" then decided to bail after a while. I hope we eventually do get to see some Mother Nature. Might do some more of these book/film character scribble sheets! All part of my imagination so please no bagging me out because it's inaccurate.
Pitch and Mother Nature @William Joyce