The Lady's encounter with that lovely fox is meant to be a brief digression before the commencement of the very battle, on which the RPG story is wholly based. And it's also a quite smart expedient I felt like using during the narration. Parentheses of this sort are often exemplified by akin digressions in ancient literature, when minor details may bear significant meaning and sense in the holistic outlook of the story: references to recurrent themes, exploration of obscure passages, the widening of a character's moulding and so on. Suffice it to say, therefore, that I did want to continue this long tradition of old which just needs be honoured, anytime one may do that.
The fox thus represents Arda itself. Its innocence and buoyancy. The primitive and ancestral guise of the world, as it was first envisaged by Ilúvatar and then made into reality by the labouring of the Valar. Fierce, wild and innocent. Later, the destiny of Arda was inexorably intertwined with the battle infuriating between the two sides ruling Eä: the Archangels, endowed with the sole authority to govern, and the seditious Melkor. Henceforth, innocence was marred and rendered a past memory; many wounds and crimes, along with the burden of time which by all must be borne.