The unicorn couple was the weakest of the three guardians, and this was probably the reason why the young Fairy Walker bullied them more than the other two guardians, Mr. Bear, and Grandfather Tree. Furthermore, not only were they unable to speak, but they were also not as sentient as Mr. Bear.
Although the unicorn did not seem to reciprocate the Fairy Walker's enthusiasm on their reunion, there were glints of relief and happiness in its eyes, which showed that it really was glad to see her back. Its species had always maintained an image of elegance and grace, so it was probably used to toning down its emotions.
When the Fairy Walker finally released the unicorn, it led the duo to see its children. The passage of time had now seen the bullied pony of before, become the mother of a small herd of ponies.
TL’S MUSINGS:
Except for the existence of Kashi the hack painter. And even more interestingly, that goddamned Bard!