Eclipse of Harmony

Prince Sonder is the overlooked heir of Equestria and the secret son of Princess Celestia and King Sombra from the Mirror World. Because he was born to parents from two different worlds, he is technically not supposed to exist and was kept hidden from the public to avoid a media frenzy while he was growing up. He is a tall white Alicorn with a long, flowing teal and dark blue mane, often seen in white and gold royal regalia with a sun motif. Personality-wise, he is patient but deeply resentful, having watched Celestia replace his only childhood friend, Sunset Shimmer, with Twilight Sparkle, and later witnessing the public adoration of "artificial" Alicorns like Cadence and Twilight while he remained a secret.

Prince Oberon is the adventurous and artistic son of Princess Luna and Orion, a Kieran traveler. He was raised in secret in the Forbidden jungles by guardians like Ahuizotl to avoid the complications of having another secret royal in Canterlot. He is described as a "hot goth" and a "nice guy" who features dark purple and black fur, Kieran-style tufted ears, fangs, and large black wings with reddish-purple gradients. Oberon inherited his mother's ability to dreamwalk, a skill he used to secretly watch over Equestrians; through this, he met his childhood friend Bubble Brew.

Princess Flurry Heart (Mera) is the daughter of Princess Cadence and Shining Armor, and unlike her cousins, her birth was public knowledge from the start because the Crystal Ponies already knew of Cadence's pregnancy. She is a pink Alicorn with a voluminous multi-colored mane of blue, purple, and pink, adorned with crystal-themed jewelry and armor. Though she is a beloved public figure, she struggles with an inferiority complex and was initially jealous of Eliza Magpie before finding common ground with Saunder. She is currently in a romantic relationship with her royal guard, Golden Glimpse.

Prince Atlas Sun serves as the new Element of Magic and is one of three children of Twilight Sparkle created through a magical spell. He was brought to life using the DNA of Star Swirl the Bearded, which has left him feeling like "anxiety attack personified" as he struggles to live up to the massive legacies of Star Swirl, Celestia, and Twilight. He is an orange stallion with an orange, teal, and purple mane, typically wearing a red and pink royal cape. While he has a snarky ego, he is deeply stressed by his responsibility to ensure his brother, Vi, does not turn evil like previous "opposite" magical pairs.

Prince Violet Moon (Vi) is the Element of Honesty and the brother of Atlas and Eliza, also created by his mother, Twilight Sparkle. He was made using the DNA of Stygian, but the spell unintentionally included dark magic from the Pony of Shadows. Despite this dark origin, Vi is a laid-back, chill, and nerdy pony who loves studying history. He is a grey pony with a light blue mane with green and dark blue streaks, wears glasses, and sports a black diamond-shaped collar.

Princess Eliza Magpie represents the Element of Laughter and was created using the magic of the ancient Princess Amore. She is the youngest child of Twilight Sparkle and sister of Atlas and Violet. She is a bubbly and happy "sparkle princess" with a yellow coat and a large purple, pink, and blue mane featuring a snowflake motif. Shortly after her creation, she was kidnapped by Radiant Hope, which led to her meeting Erebos Azure. She shares a "forbidden romance" with Erebos, though to everyone else, he appears to be her imaginary friend since only she can see him.

Princess Rara Avis (Rara Avis) is the Element of Loyalty and a "twinkle-eyed" Pegasus from the ancient kingdom of Timbuktu. She was the third princess in line for her kingdom and, considered a "spare" heir, was given to the Crystal Empire as part of a peace treaty. She is a prissy fashionista and celebrity-like singer with a magenta coat, a blonde mane, and sparkling "twinkle eyes". Although she was essentially adopted into the Crystal royal family, she is not always looked upon as fondly as a natural heir.

Aria Lazuli is the Element of Generosity and a light blue unicorn with a pink mane decorated with flowers. She lived in the woods for much of her life and possesses a peaceful, "Zen," and down-to-earth personality reminiscent of the pony Tree Hugger. She was discovered and brought to Canterlot once the Royals realized she was one of the newly manifested Elements of Harmony.

Percival Starshine serves as the Element of Kindness and is a hardworking Earth pony with a bright green coat, a teal mane, and an orange bandana. Originally an orphan from Manehattan, he moved to Ponyville to work as an intern at Sweet Apple Acres. Upon learning he had no family, Applejack decided to adopt him as her own son.

Bubble Brew is a light green unicorn with a dark mane from the town of Hollow Shades. She is a talented potion brewer and made history as the first unicorn capable of dreamwalking, leading her to become the personal student of Princess Luna. She is childhood friends with Prince Oberon, having spent her nights "vibing" with him in the dream realm before eventually being called to Canterlot to help escort him home.

Erebos Azure is a shadowy Umbrum pony created by Radiant Hope using stolen magic and dark umbrum magic to avenge the death of King Sombra. He has a dark grey coat and a teal mane, and he possesses the ability to disappear into the shadows. He has lived as Eliza Magpie's "guardian angel" and secret best friend since they were foals; because he remains hidden from others, he is widely believed to be her imaginary friend.

Jinx Hullabaloo is the daughter of Discord and Fluttershy, created by magic by accident. She is a draconequus-pony hybrid described as a "long little slinky" who moves and acts much like the Cheshire Cat. She is a chaotic spirit who loves to cause mischief wherever she goes, though her parents love her dearly regardless of her antics.

Golden Glimpse is a black "twinkle-eyed" Pegasus with a white mane who originally hailed from the city of Timbuktu. He was sent to the Crystal Empire as part of a peace arrangement to serve as a royal guard and squire, with the goal of fostering better relations between the two ancient civilizations. He is the loyal guard of Princess Flurry Heart, and the two have since fallen in love and are currently dating.