I didn’t want to have to write a long novel but here I am because you don’t seem to understand how I am right and you are wrong.
First: I will tell you what it means to be emotionally weak.
Being emotionally weak means that you do not have the ability to cope well with emotions or situations.
To be emotionally weak means that you just have no emotional capabilities or capacity. This either means that you feel them WAY too much to the point that they overwhelm you and take control, or you don’t feel them at all, because you are too afraid and you block them out.
Now, what is an emotionally strong person?
Emotionally strong people manage the stresses of daily life more effectively, and recover more quickly from challenges and crises when they arise. Emotional strength refers to a person’s internal coping abilities.
Emotionally strong people can keep emotions and logic in balance and have the ability to adapt to changes fast.
They have the ability to look at things objectively without being influenced by emotions or impulsiveness while still being able to express their feelings freely.
*Note: Whether you are emotionally weak can depend on your upbringing. Psyche was locked up away from the world, in her birdcage, which made her become naive. (Naivety is a weak trait to have.) She was innocent, had lack of experience, wisdom, and judgment.She had the thought process that everything was great, until she finally decided that she wanted her freedom.
Medea was raised into a situation where she had no choice but to adapt extremely quickly, studying, preparing to become crown princess, etc. She became emotionally strong through that process. Cold-hearted, as well. Though I will not say Medea is completely flawless, for she has weaknesses but her strong points outweigh her weak ones.
Psyche is objectively emotionally weak. She is not a “strong” character. Even in Medea’s body she was still weak, and no, she wasn’t able to keep up Medea’s act, she could not adapt quickly and was acting unusually for someone who is supposed to be “acting” like Medea. Which you should be able to see clearly. Medea on the other hand, was able to adapt quickly to her surroundings and behave accordingly. If you compare the two, you will see an obvious difference.
Yes, Psyche had the courage to go against Medea’s father but made that decision was impulsively based on her emotions. It doesn’t make her strong. She jumped from the balcony injuring Medea’s legs all on a decision she made on a whim because she felt a strong sense of emotion... She had didn’t think through. Again, something weak on her part.
When the prince came into her room, Psyche continued to act like a weak little girl before him. Completely and utterly not keeping up the act she was supposed to. She even let the prince kiss her in her state of vulnerability. Not only that, but after that event, Psyche was left so emotionally weak, broken, and empty, that after that she decided to injure Medea’s body even more because she couldn’t contain her emotions overflowing. Which was also quite weak of her.
There are few pieces of evidence you can bring up to try and call her a “strong” character which she is most definitely not. The evidence proving she is weak outweighs the evidence you have that calls her “strong” I even debunked what you said so your argument is no longer valid. How about you “try again.”
I’m just going to block you now because I don’t want this thread to become an argument when it’s supposed to be a happy one with spoilers. I can tell it will be going that route if I allow you to reply to me because of your subtle attitude.
No, I am not blocking you because I “have nothing else to say” or because “I know you’re right” or because “I just can’t have a proper argument” or any of the excuses you may try to make up in your brain... Because I am right.
I am simply blocking you because of the reason(s) I have stated above. Your subtle attitude and slight passive-aggressiveness. Which I shall not deal with. Maybe if you had made valid points I would use my time for this argument, however I already disproved your points to be false... And even provided an example as to how even more wrong you are about her character.
Have a good day/night. I apologize for any spelling/grammar mistakes.

MAJOR SPOILER!!! REALLY MAJOR!! AND QUITE SATISFYING!!!
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GUYS IN CHAPTER 40!!!! I REPEAT!!! CHAPTER 40!!!! THEY SWITCH BODIES!!! AND PSYCHE TURNS ONTO A BADASS SHE IS NO LONGER THE WEAK LITTLE GIRL!!! YOU KNOW THAT THING WHEN FL LEADS CUT THEIR HAIR?! SHE DID THAT!!! AND SHE BROKE UP WITH THAT ASSHOLE PRINCE!!! GO PSYCHE!!!! KYAAAA!!! FIRST A BUNCH OF NEW MANWHA COME OUT AND NOW THIS?! I AM SO HAPPY! ヾ(☆▽☆)
PSYCHE I AM ROOTING FOR YOU!!! AUTHOR I LOVE YOU!!!!! THANK YOU FOR PRODUCING SUCH A WONDERFUL STORY!