Do you ever think about how Sasha reacted when she got to Amphibia?
Like, she was immediately tied up and kidnapped by frog soldiers that could have killed her. She wasn't given time to grasp the situation, wonder where her friends were, figure out where she was, etc. Just thrown into chains.
She didn't have a nice farm family to ease her into it, or a king to help her find her friends and let her explore the worlds culture. She was literally a prisoner. The only reason they didn't kill her on the spot was because she was an anomaly that they wanted answers from. They wanted to know if there were more humans, and she knew that.
As far as she knew, the only humans in Amphibia were her best friends, the friends that she knew since they were toddlers, The friends that she needed to protect, the friends that she needed to find. She had no idea where they landed, or if they were even safe. She might've assumed that they were in a similar situation to her. At that time, her main goal was probably "escape and find the girls".
Anne and Marcy were probably one of her biggest motivations to escape. Sasha was locked up in a cell, with nobody but the occasional guard that gave her rotten food, and she exploited the fuck out of that.
She turned on her popular-girl-charm and thrived. She pissed off one of the most feared toads ever for fun. She got multiple guards to quit their own job by only talking to them. She learned their interests, their hobbies, what made them tick, and used it to her advantage. She knew how to get close to them, because thats what she'd do in school.
She got the girl who took Annes snack to give it back, she got the teacher to let them go to the bathroom, etc. Because she was popular. When your popular, you know learn to make small talk, how to be charismatic, you learn how to manipulate.
She thought out her options, her surroundings, and the people, then managed to dig herself up from the fucking grave.
she taught the people how to be better. She taught them breathing exercises, food recipes, optimism, and a lot more. Sasha made herself a crucial weapon to them, and to put her in chains again would be a mistake. She made that fact clear when she defeated a giant blood-thirsty monster with cheerleading. She had more skill with cheerleading than any of the toads in there.
She built a friendship with the soldiers, and taught their leader how to interact. At this point, she could have left, but she saw potential.
She was given a castle,
She was partying,
And she let it go to her head.
Her end goal was always to go home with her best friends, and that never changed. When she was a captive, when she was a soldier, even when she was the bad guy. she wanted to get home.
But that wasn't her priority.
Sasha wanted to have fun first. She didn't care if the girls went home before her, because she had a choice to leave. Earth was an end goal, not her main goal. Sasha wanted to rule over a kingdom, be treated as royalty, to live her fantasy life.
Sasha had the same dream as Marcy, but the difference is that she didn't want it to last forever.