U474 Petals in the Wind's Links
As Petal is a very shy horse, she flourishes under Briar's calm, patient, and gentle hand. The two have a very strong bond with one another, a sort of unspoken understanding.
Briar doesn't remember a lot of his past, and with the loss of his memory came the loss of his companionship. Petal has helped him creep out of his shell, and has in part filled the loneliness he feels since his awakening.