My Little Pony: The Defender of Equestria (Male Reader)

Prince (P/N) is the oldest child and son of the late King Cobalt and his wife Queen Esmeralda (the older sister of both Princess Celestia and Princess Luna) as well as the Future King/Ruler of Equestria where its three species of ponies, earth ponies, pegasi, and unicorns live harmoniously.

(P/N) along with his best friend Twilight Sparkle, travel to Ponyville, alongside Spike (her Dragon Assistant), Princess Morning Star, and Princess Roxy Lovli Pop (P/N's younger sisters) and become close friends with five other ponies: Applejack, Rainbow Dash, Rarity, Fluttershy, and Pinkie Pie.

Together, the eight ponies discover that they all represent the different facets of friendship, with magical artifacts also known as the Elements of Harmony, and the longer that (P/N) stays around the girls, the more their friendly relationship will turn into something much more romantic.
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{I DO NOW OWN MY LITTLE PONY FRIENDSHIP IS MAGIC. IT IS OWNED BY HASBRO.}