Let's start from the beginning (so I could gather my thoughts too, I'm a bit confused myself):
The Moon Goddess - is the god of death. - so the Sun God, who is scared of death, killed her. He didn't know that she is incapable of dying as she is death itself. So she reincarnated.
Erzebet - the witch. - She's the Moon Goddess's reincarnation which is why she's titled a Witch and is stronger than any other entity. - The Sun God found her too early and declared she's to destroy the world, then ultimately, SHE DIED. - Sun God brought her to him and made her into his servant, AKA, The System.
System - the one who handles the world/system under the Sun God. - She lost all her emotions and humanity in exchange for helping Lee Seojun who was "going to die" (which IMO, there was no need to) if she won't do anything about in---enter the servant contract with the Sun God. - Bound to the Sun God and without anything in return. In other words, the piece of shite scammed her. - As she learned not to fully trust anyone, she split her soul to help Lee Seojun in her place, AKA, the Erzebet Double. - she was curious about Seojun so she went down to earth as Yoo Eunhye to spend time with him. She fell in love with him and decided to split her soul, AGAIN, to stay with him on earth. AKA, Yoo Eunhye.
Erzebet Double (Split soul) - She is the one in contact with the present world. In other words, she is the one we see in the current timeline. - The first Erzebet already died in the other world so this one is a duplicate. - She's the master of the current adorable baby Seol-ah.
Yoo Eunhye - mother of Seol-ah. - The System, once again, divided her soul and erased all of that soul's memories, making her believe she was originally born on Earth. - Her soul was part of a divine being, Moon Goddess, so she's mostly the reason why Seol-ah is stronger than any creature on Earth, and (a painful fact), the reason why Seol-ah is born a Witch.
Let's start from the beginning (so I could gather my thoughts too, I'm a bit confused myself):
The Moon Goddess
- is the god of death.
- so the Sun God, who is scared of death, killed her. He didn't know that she is incapable of dying as she is death itself. So she reincarnated.
Erzebet
- the witch.
- She's the Moon Goddess's reincarnation which is why she's titled a Witch and is stronger than any other entity.
- The Sun God found her too early and declared she's to destroy the world, then ultimately, SHE DIED.
- Sun God brought her to him and made her into his servant, AKA, The System.
System
- the one who handles the world/system under the Sun God.
- She lost all her emotions and humanity in exchange for helping Lee Seojun who was "going to die" (which IMO, there was no need to) if she won't do anything about in---enter the servant contract with the Sun God.
- Bound to the Sun God and without anything in return. In other words, the piece of shite scammed her.
- As she learned not to fully trust anyone, she split her soul to help Lee Seojun in her place, AKA, the Erzebet Double.
- she was curious about Seojun so she went down to earth as Yoo Eunhye to spend time with him. She fell in love with him and decided to split her soul, AGAIN, to stay with him on earth. AKA, Yoo Eunhye.
Erzebet Double (Split soul)
- She is the one in contact with the present world. In other words, she is the one we see in the current timeline.
- The first Erzebet already died in the other world so this one is a duplicate.
- She's the master of the current adorable baby Seol-ah.
Yoo Eunhye
- mother of Seol-ah.
- The System, once again, divided her soul and erased all of that soul's memories, making her believe she was originally born on Earth.
- Her soul was part of a divine being, Moon Goddess, so she's mostly the reason why Seol-ah is stronger than any creature on Earth, and (a painful fact), the reason why Seol-ah is born a Witch.