From left to right, as per usual.

Eventide "Pearl" — Floating ghostly figure with the long tail — The unfortunately deceased daughter of Luna and Discord, heir to the Chaos throne if it ever was available. She had strong control over the tides and anything related to water. Fun (or not-so-fun) fact, her teeth are like those deep-sea fish.

Zodiac — Large ram/sheep-like creature with bear paws — The firstborn child of Luna and Discord. He's always been quiet and serious, but his personality has been recently more sad upon the passing of his younger sister. He can summon weapons depending on the zodiac of the months.

Discord — YOU ALL KNOW HIM — Discord honestly didn't think he was going to be able to have children, even upon falling in love with Luna. As such, he didn't really know how to act when his child was born, and despite spending time with little Zodiac, he was fairly awkward for the first few years. Later on he got used to it and became a "fun dad".

Luna — YOU ALL KNOW HER — Luna is admired particularly for her mysterious beauty and compassion towards those who don't "fit into" pony society. Creatures of all the lands seek her out for protection and guidance. Originally she was looked down upon for turning into a Nightmare, but that stigma has since been shaken when she displayed her ability to lead.

Celestia — YOU ALL KNOW HER — The graceful and powerful co-Empress of Equestria, spirit of harvest. Some say that gazing upon her for too long will cause permanent blindness as she radiates heat, beauty, and light. This really isn't true at all. She does seem to glow softly though, especially her eyes, which are bright like suns.

Aspen — YOU ALL KNOW HIM — Powerful and steadfast, Aspen was quick to gain popularity and awe in the light of Celestia and his engagement. He always holds himself high and has a regal stance, and delivers advice quickly yet carefully. Despite all of this, he actually has a goofy side, and loves to make his wife laugh.

Lacuna — Sunset-coloured peryton with almost white eyes — The beautiful and blind daughter of Celestia and Aspen, Lacuna is a slightly unsettling figure among the Equestrian populace. Her cutiemark is a skull, which is seen as something more "evil" based, though she seems fine… anyway. She spends a lot of her time wandering less populated towns and nature.