Sonju's horse

Promised Forest Arc
Before a group of demons could capture Ray, Sonju and his horse save Ray in a nick of time.

Search For Minerva Arc
Somewhere in the forest, Sonju and Mujika were about to ride the horse, Mujika stared towards a distance and smiled. Sonju asked her what is up, to which Mujika replied how she was fine as she proceeded to ride the horse with Sonju.

Trivia

 * Sonju's horse bears a heavy resemblence with the Sleipnir, the noble steed of Odin in Norse Mythology.