The arrangement at the beginning, with Shasta not controlling the reins, shows how Bree is leading the way. Shasta is on a journey toward freedom, but he still has not yet learned how to find his own way. Shasta’s reluctance to go fast shows his reluctance to leave behind his familiar old life, but Bree gives him the encouragement he needs to get started on the journey. Bree’s long full name is meant to sound like the noise a real horse makes.