Wow! I love fairies and I could see this one " shining silver" and her stamping her little feet in "ire". Why is she mad? . I'd like to see an adjective to describe "ire".
Awesome rhyming. All those ""Ight" words and no repeats!!
The rythym isn't always consistent but I like the image of the dancing, alighting, huddling and the structure of the poem works.
I find "to most winter is.." sticks a bit when read aloud.. Maybe a better word word be "to others winter is a plight" for flow and it also adds the needed syllable.
eg. "To others ,winter is a plight
For her ,it is her guiding light."
The rythym then flows with your first stanza. Just an example /idea I thought of.

The other one that sticks out is the last line of 5th stanza. It seems short and abrupt compared to the nice flow of other lines.
the last two lines in the last verse could be longer longer by adding more syllables (eg. " her freezing ire" "cold and frosty" come to mind as examples.) This would add a more smooth flow to the read unless you wanted it to be different in rhythm .

These are just some comments intended to improve the charming picture you paint here. And I guess I do like flowing rhythms. The energy of wonder and light is evident and I can see why the entry of negative onlookers would be unwlecome. The title Frost Sprite is certainly borne out in the poem. I like that she is delicate and tough too!

Thank you for sharing your gift and following your inspiration. Imagination is so needed in the world.
Welcome to WDC. Look for ward to reading more of your work.
Write On!! Light on the Path, Eyestar

** Image ID #1611754 Unavailable **