First I ditch alignment. Trying to develop more robust portrayal or persona within that seems pointless.I've got a longer write up about my difficulties with nature-themed characters over here, but this has been a struggle with me for some time. Nature tends to be portrayed as "gray-side," meaning that there's no easy good/evil or law/chaos dichotomy to fuel conflict. That in turns means that it's hard for me to roll up a nature-themed protagonist: What exactly am I supposed to be struggling against?
So help me out here. How do you go about making a ranger or a druid with meaty plot hooks? And from the GM's side, how do you allow such a character to become central to a campaign's conflict?
Second dont try to fo "nature" but choose an aspect or two of nature and emphasize those while honoring the others more as a foundation.
Once you have one or two aspects, go for it.
Look st the various divines and myths that were about natural aspects - build on them.
Persephone and the turn of seasons, dark and light, embracing opposites, etc etc gives you one definitely fertile ground to plant a character in.
Chauntea vs Silvanus - nurturing teaching agriculture sharing vs defending the wild side and hunt- and thry were an item in their day. (The Morrigan and the Daghdah as well.)
Or maybe your aspects are more centered on making sure the rarer beauties of nature like ssy elemental hot spots or fae sites or the paragon animal spirits etc.
Pick a few things, find dome relevant sources and fiction if needed and go from there.
I think of it like this, I font design a charscter to be good. I design a character who cares about and tries to do things and those things are good - leading to the character being good.