Equestria has three types of ponies. The earth ponies have a unique tie with the land, and can tend and produce from it best. Pegasi have wings, and control the weather. Unicorns have horns, and thus magic. They control the seasons.

My own duty is to raise the sun each day, just as my sister raises the moon each night. Though I already have seen that this world does not function in the same manner.

[She glances up and away, thoughtful; her expression is unreadable.]