Riley's horse and constant companion.
During the party's trek back to Balamb in Week 2 Argo becomes agitated near Riley and starts to buck whenever she comes near but Ritch is able to calm Argo down. When the party are back in Balamb Riley checks on Argo and notices that the horse is out of breath in and worst shape then before. When Ritch inspects Argo he says the horse is over-worked and needs tending to, which he does.