Queen Chrysalis is a female changeling and the main antagonist of the season two finale, the season six finale, the IDW comics' first story arc, Budge Studios' mobile game Harmony Quest, and one of the main antagonists of the season nine finale. She is the queen of the changelings and a shapeshifter who appears as Princess Cadance in order to hypnotize her fiancé Shining Armor, invade Canterlot, and eventually take over Equestria.

In the season six finale, Chrysalis is dethroned from her position as changeling queen. In the season nine premiere, she, along with Lord Tirek and Cozy Glow, joins forces with Grogar to defeat the Mane Six and conquer Equestria. She is defeated by the Mane Six and their allies in the season nine finale, and turned to stone along with Tirek and Cozy.

Physicial Appearance: Queen Chrysalis spends the entirety of A Canterlot Wedding - Part 1 and the beginning of Part 2 disguised as Princess Cadance, with her eyes occasionally flashing green and her magic glowing green instead of Cadance's blue.Once the real Cadance confronts her, Chrysalis transforms into a pony-like creature with a twisted unicorn horn, a pair of tattered insectoid wings, and stands as tall as Princess Celestia. In addition, she has a sharp pair of fangs and dark green eyes with elongated oval pupils. She has a teal mane and tail, blue-green chitinous plating over her midsection, and she wears a small, black crown tipped with blue orbs. Her voice has a distorted echoed quality, as if two voices are speaking slightly out of sync. This trait is not carried over in her subsequent appearances. Her legs, mane, and tail are full of holes, and her limbs and torso are very slender. Like other non-pony characters, she has no cutie mark. Her wings, full of holes like her other body parts, end in sharp points instead of curves (like those of actual insects); when they flap, they generate a buzzing sound. In a flashback in My Little Pony: FIENDship is Magic Issue #5, Chrysalis appears with a fully solid body and no crown. She steals the crown of King Orion and reshapes it into her own, and her body is blasted full of holes during a battle with Princess Celestia. After using Grogar's Bewitching Bell to empower herself in The Ending of the End, Chrysalis gains armor on her hooves and torso, bigger wings, and a new, bigger crown. Her eyes and the tip of her horn also turn bright green.

Personality: Queen Chrysalis is a scheming, cruel, fierce, and manipulative individual whose primary concerns are gaining power and feeding her changeling subjects. Upon perceiving Twilight Sparkle as a potential threat to her plans, she turns her family and friends against her and enjoys mocking her both during and after Twilight's imprisonment in Canterlot's underground caves. While capable of mimicking Cadance well enough to fool most, she is unable to fool Twilight due to their close bond and her demanding and insincere behavior displayed in A Canterlot Wedding - Part 1. In To Where and Back Again - Part 2, Chrysalis bears resentment toward Thorax for abandoning the hive, considering him a "traitor". She also shows little regard for her subjects, believing that she alone knows what's best for them, and that her leadership is absolute. While boasting about her plan, she relishes the idea of every pony in Equestria doing as she says, showing that she desires control just as much as power. In The Mean 6, Chrysalis is shown to have become far more deranged and unstable after fleeing from the hive. She talks to the photos she took of Twilight and her friends as if they are the actual ponies themselves, prancing and talking in sing-song as she describes her plan. She also shows deep hatred towards Starlight Glimmer for causing her downfall, planning to use her copies of Twilight and her friends to destroy the real ones while forcing Starlight to watch. In The Beginning of the End - Part 1, she carves the faces of unreformed changelings into pieces of wood and talks to them as if they are her subjects, demonstrating her further loss of sanity. In Frenemies, she is revealed to have kept the piece of wood that was once Mean Twilight. Working together with Cozy and Tirek to overthrow Grogar helps her regain some of her former sanity. Chrysalis is deeply arrogant, thinking lowly of her enemies, and has a habit of becoming complacent when she believes victory is within her grasp. Despite gaining strength from stealing love, she has no concept of its true power, scoffing at the thought that Cadance's love could restore Shining Armor's strength. She also assumed the Mean 6 would obey her commands without question, leaving her unable to see Mean Twilight's betrayal coming. She also believes the only reason the Mane Six keep defeating her is because they "cheat". And despite being ousted from her position as ruler of the changelings, Chrysalis still continues to refer to herself as a queen. Chrysalis refuses to accept the blame for her own failures, choosing instead to blame her subjects for not living up to her expectations. She also lays the blame for the hive turning on her solely on Starlight, rather than admit her own treatment of her subjects played a major part in it. Like Tirek, Chrysalis is visibly awed and intimidated by Grogar, although she briefly expresses amusement at his long-ago defeat at the hooves of Gusty the Great. After joining Grogar and the other villains, Chrysalis shows contempt and hostility towards them, only being concerned with her vendetta against Starlight, but is eventually able to work together with Cozy and Tirek to obtain Grogar's bell and conspires with the two to betray the ram, while still rejecting the idea of becoming friends with them. Chrysalis also admits to having admired Discord before friendship "ruined him". She openly claims that friendship is "like a disease" and refuses to allow it to "infect" her like it did her hive. In Frenemies, Chrysalis reveals that she doesn't drain all the love out of her victims in one go, instead choosing to save a little for the next day.