Ragnarok's background story

Ragnarok
Another name: Laevateinn (It is his first name, but long-forgotten)(but in the past, people calls him with that name)
Full Name: Ragnarok Laevateinn
Description and Summary:
The Dark Legendary Sword used by Loki before and the Dark Legendary Wand used by Lokia.
He is the brother of Excalibur.
He had the full name “Ragnarok Laevateinn”, but someone renamed him with just “Ragnarok” to control him easily (Spirited Away Reference, in case you couldn't get it).
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Part 1. Loki, the one whose fate is quite similar to Ragnarok
Character:
Loki
Odin’s half and elder brother. They have the same father, but different mother. Their mothers, anyway, have died when they were still baby.
Odin
A king who has the blood of god (his mother is a god, Freya). Loki’s half and younger brother.
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After Ragnarok had left his home, he became Loki’s weapon.
Due to the similarities between them, their minds are quite on the phase and understand each other quite well; they are elder sons who are not doted on by their parent and overshadowed by their younger brothers.
So, Ragnarok willingly cooperated with Loki to kill Odin and helped Loki get the power and become the King. Thus, the era “Ragnarok” started. **
** Ragnarok means “The Doomsday/Twilight of All God”, and coincidentally, Odin has the blood of god. So, the name of the era “Ragnarok” is not because of “Ragnarok” Laevateinn only, but also because of the death of a half god, Odin.
But, the action of Loki’s, well, made many people unhappy with him. Thus, Loki ended up being assassinated and Ragnarok was sealed.
Part 2. Lokia, a witch and also a witch hunter who is a descendant of Loki
Character
Lokia
A descendant of Loki
A talented witch, a princess-would-be** and a witch hunter
** If only Loki was not killed.
** But actually in another way, she is actually still a princess, as her mother is a queen of a Kingdom. (Her mother married to a King) But, she dislikes the monotone life of a princess.
Despite being a witch, she actually despises being a witch. But, because she has the talent as a witch, she doesn’t want to waste it(she can't take the talent off after all); she takes it as her destiny and decides to use it in another way. And so, she joins Witch-Hunting Clan (WHC) and help hunting witches.
She learns every (including offensive**) magic, except magic for only destructive purpose.
** Or else, how is she able to hunt witches down?
Witch-Hunting Clan (WHC)
Obviously, a clan that hunts witches
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Many years later, Lokia, a descendant of Loki, went for an adventure. She has found and unsealed Ragnarok. She selfishly turned Ragnarok into a wand. **
**As a witch, wand is much easier to use than sword. Even though she doesn’t want to be a witch, she is still a witch after all; She can't deny the truth after all.
Ragnarok was not really willing to this, but he was unable to do something. Besides, after some days had passed and he had thought about it thoroughly, he found it unnecessary to argue over, as becoming a wand was not really as bad as he thought and he got used to the wand form. **
** Beggar can’t be a chooser… He knows it quite well.
** But if he can choose, he prefers sword form.
He is quite unhappy with his new master, Lokia, for not only being a wand.
Being a witch but hating witch and even hunting witch, Lokia is considered as a traitor and has become one of the main enemies for the witches. Besides, Lokia is too kind and naïve, so she is always being made use of. Thus, they are always gotten in trouble and disadvantage. **
** However, Ragnarok doesn’t really dislike Lokia. In fact, he has been in love with her. (And, actually Lokia loves him also.) There is a thin line between hate and love, huh?
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The WHC, however, had collapsed. The leader of the clan is killed. Lokia is forced to run away.
But, betrayed by Ragnarok, she has been found by Medusa, and killed. **
** If you prefer Ragnarok being a bad guy, then reading till here is already enough.
But…
** Actually it is what’s in Ragnarok’s memory, as he is brainwashed.
Because of being brainwashed, he has forgotten his first name, Laevateinn.
Maybe you will ask “Why is Medusa bother doing this?” Actually it is to make Ragnarok have this wrong memory; He willingly betrays his master, Lokia and thus, he can’t put the blame on her for Lokia’s death. She want to erase Ragnarok's conscience and make Ragnarok a demon who loves and enjoys killing.
But, Medusa is not afraid of being backstabbed by Ragnarok?
Actually, Medusa has made a pact with him, so Ragnarok can't betray her.
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The True Story…
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The WHC, however, had collapsed. The leader of the clan is killed. Lokia is forced to run away.
But, betrayed by a spy in WHC, she has been found by Medusa, and defeated.
Medusa intends to kill her, but Ragnarok has stopped Medusa. Unfortunately, Ragnarok was knocked out and end up being brainwashed and sealed.