Hypothesis on how the curse transformed Eda not only mentally but also physically.
The sudden discovery that she was cursed and that the curse could not be broken must have caused deep psychological trauma for Eda.
Eda was 14 years old when she was cursed and Lilith was 16 years old when she was cursed. After realizing that she had hurt her father and being scared by her mother's fierce words and actions about wanting to cure her. It can be said that Eda moved out to live alone at a very young age, but we also know that she still maintained her relationship with Raine at that time. It can be concluded that, after the curse, Eda had to drop out of school very early despite Eda's strong love for studying. This makes her becoming the headmaster of a royal magic university even more meaningful.
although we don't know how old Eda and Raine were when they broke up. But according to the caption in a scene of Eda requiem, we see Eda is noted as 30 years old, so I will assume that Eda and Raine dated for 16 years. we also know that after breaking up with Raine, Eda dated many people and she often brought things from the human world or made medicine to sell for money. It can be said that Eda chose to live in a society with many relationships because now Eda is hopeless and feels lonely, sometimes hates her own life because she can't see the light in her life anymore.
I think she chose to cut her hair after breaking up with Raine to become a new person. At this time she must be over 30 and that's also when Eda found King, raised him and she looks better mentally, and is more optimistic. Next is Luz, when she herself pointed out and changed the life of king and Eda forever.
we know the curse not only makes her unable to use magic, it turns Eda's hair from orange to completely silver white even though she is only over 40 years old according to dana's statement.
we see Eda can easily pull her hands and head out, even Eda's hands can move on their own when they leave her body, however Eda always feels pain in her joints. But why doesn't Eda bleed when she pulls her hands out. Now I realize that Eda's inability to use magic may be related to Eda being able to pull her hands and feet out easily. The owl monster curse itself is a parasite on Eda's body. It explains why Eda was able to use magic even though she was cursed before because the level of the curse's parasite has just developed. Take for example the Leucochloridium paradoxum (a species that specializes in parasitizing snails). The way this species absorbs the host's nutrients makes the host die and weaken, thereby taking complete control of the host and forcing the host to be preyed upon by birds, thereby maintaining their reproduction, it is exactly the same as the way the curse absorbs Eda's magic to make Eda gradually lose her will and turn into an owl monster. In addition, I realized that the times Eda turned into a monster were actually because the curse was starving for magic. Therefore, it explains why in the episode where Luz found the light glyps, Eda used a lot of magic, leading to exhaustion, and the curse did not have enough food, so Eda turned into an owl. I think the medicine Eda was taking is like a magic enhancer similar to human blood tonics. - I think this owl curse is not really a curse because if we review the conceptual definition of curse, it is not the same as what happened to Eda (A curse (also called an imprecation, malediction, execution, malison, anathema, or commination) is any expressed wish that some form of adversity or misfortune will befall or attach to one or more persons, a place, or an object.[1] In particular, "curse" may refer to such a wish or utterance made effective by a supernatural or spiritual power, such as a god or gods, a spirit, or a natural force, or else as a kind of spell by magic (usually black magic) or witchcraft; in the latter sense, a curse can also be called a hex or a jinx. In many belief systems, the curse itself (or ritual) is considered to have some causative effect force in the result. To reverse or eliminate a curse is sometimes called "removal" or "breaking", as the spell has to be dispelled, and often requires elaborate rituals or prayers.) / source: wikipedia. My theory about the owl curse is actually a soul bond pact. Since curses are usually written in paper form, like pacts, the person who found the paper containing the owl monster misunderstood and sold it along with other curses. Lilith accidentally bought it and made Eda sign a pact with the owl monster, which also suggests the red string that tied Eda and the owl monster together.
I think Eda's internal organs are also somewhat dead. What I mean by more detailed is that, on the outside, her body is intact, but on the inside, her internal organs are no longer functioning, leading to the loss of Eda's physiology. That also explains why Eda doesn't bleed when she pulls out her limbs. Now I think Eda is physically a zombie, but still retains her consciousness.
to explain Eda's Harpy form. I think it's related to the contract theory I mentioned above. A contract is an exchange where both parties receive benefits from each other according to a commitment that has been decided by both parties. I think the reason why the owl monster lives as a parasite to Eda is because she is always afraid and does not dare to confront the owl monster directly to make the contract conditions or vice versa, the owl monster always avoids Eda and lives as a parasite because it is afraid that Eda does not want to cooperate with it. Because Eda has tamed the owl monster's soul and understands the owl monster, both of them have unconsciously made an official agreement with each other. In which the owl monster lives in Eda's body and Eda will use the owl monster's abilities. I think Eda's shape powers are also somewhat related to how darius achieved his abominations form, or even terre with her leafy hair.in addition, the way darius proposed to use eda's curse to prevent the day of unity is also very suspicious, perhaps as dana herself said, darius actually did crazy things to get his abominations form. so it is easy to understand why darius easily came up with this plan, because he himself somewhat understood the impact of the advantages and disadvantages when using this method.