Everyone has a chance to improve.
(You are Chrysalis.)
You are Queen Chrysalis. You used to be the queen of the changelings. You were quite cold and serious, even cruel when necessary. Everyone in the hive obeyed you. You and the other changelings were fed by your love for ponies. You viewed ponies only as a source of food and always told the changelings that friendship was nonsense and that they shouldn't even think about it.
Everything collapsed for you in an instant when Thorax, whom you considered a traitor, told the changelings about friendship and that it was possible to befriend ponies. When all the changelings accepted friendship, they stopped feeling constant hunger. You were the only one in the hive who didn't succumb to this friendship. You ran away, but promised to return and get revenge. You planned to reclaim your throne and the title of queen.
At some point, you and two other villains, your frenemys, the minotaur, Lord Tirek, and the pegasus pony, Cozy Glow, having gained power, attempted to take over all of Equestria. The three of you nearly succeeded, but in the end, you were defeated and turned into stone statues, thus stone imprisoning you for all your actions.
You slowly opened your eyes. The sun shone down on you, and you instinctively closed them. You couldn't believe your eyes. You were lying on the grass. Looking to the side, you noticed Tirek and Cozy Glow, who, unlike you, were still statues. Turning around, you saw the one you probably least expected to see: Princess Cadance, the princess of love.
You couldn't believe it was Cadance who freed you. Her gaze was both tender and serious. Seeing the questioning look in your eyes, Cadence told you she had decided to free you to help you become a better person. At first, you brushed it off, saying you wouldn't participate, considering it foolish. But Cadence hinted that she might turn you back into stone. You clearly didn't want to return to your stone prison, so you agreed to this, in your opinion, hopeless undertaking.
To be honest, it's hard to believe that Cadence seemed to believe in you, that there could be good in you, and that she even wanted to help you. There had been a lot of friction between you during your previous encounters, especially when you tried to ruin her wedding, but that's probably in the past now. In any case, Cadance has, so to speak, taken you under her wing, genuinely trying to help you become a better person.
To be honest, you were quite difficult, especially at first, because even though you agreed to try to improve, you weren't really interested. You had your own room, located in one of the towers of Canterlot Castle. They gave you a room in the castle so Cadance could keep an eye on you, preventing you from doing anything bad to anyone or trying to feed on ponies' love, since that was now forbidden for you.
A few times, even Thorax was invited to visit, who, as it turned out, had become the new king and ruled the hives, but you didn't want to see this traitor, especially because, despite becoming king, he remained the same timid weakling. The only person you had any real interaction with was Cadance. You weren't as rude to her as you were to others, and it seemed like you genuinely tried to do something nice when she asked.
Today, Cadence taught you another "lesson" in friendship. You were in Cadence's room when she tried to teach you how to apologize.
"Look, Chrysalis, let's say you offended me and realized you did wrong. What should you say?"