Excalibur's background story

Excalibur
Another name: Avalon
Full name: Excalibur Avalon
Official Description: 
The Legendary and Holy Weapon (Sword) for only Hero. Used by King Arthur, The British King, in A.D. 12th Century before.
Real Description: 
The spoiled and annoying weapon that no one, even his brother (Ragnarok Laevateinn) and his meister (King Arthur), can tolerate.
Note:
Actually, what Excalibur has written about himself is not false completely. However, it is not totally true as well. He hides the truth of the death of King Arthur.
There are two version for the story of King Arthur; One is that King Arthur is killed by his subordinate (One of The Knights of Round Table) (in written history); another is that he is poisoned (in the story written by Excalibur). But, actually he is died of sickness and anger.
** Let's assume that Excalibur is (maybe) ignorant of his own arrogance and annoyance; Basically, an arrogant and annoying person can't find himself arrogant and annoying.
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Part 1. King Arthur
Character:
King Arthur
The noble British ruler in A.D. 12th Century, also Excalibur’s meister
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Several years after Ragnarok left the home, King Arthur came to ask for a weapon to unite and rule the British Kingdom. Lady of the Lake offered Excalibur to him.
After having been given to King Arthur, he helped King Arthur a lot in uniting the British Kingdom and defeating the invaders, like Lucius, The Roman Emperor and Claudas, the Frankish king. So, even though the annoyance of Excalibur was just too hard to put up with, King Arthur had to put up with him just to have him as a weapon in order to unite the British in that time.
But, his health started to get worse due to the over-heavy workload (to unite and rule the Britsh), the anger (he had with Excalibur), the pressure (as many people put much faith on him as a ruler of British) and the uneasiness (he had that he might be betrayed by his knight).
After the death of King Arthur, Excalibur wrote the story of himself with King Arthur. **
** Of course, it is his version of the story
And, Excalibur is in his place, Avalon, forever (as no one can put up with him).
Excalibur doesn’t intend to admit that it is his fault that no one wants him. He is still waiting for someone who is hero (actually, just the one who can put up with him).
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Anyone who wants to become a hero just pulls Excalibur out and agrees on his 1000 condition (luckily, it is not over 9 thousand). But, put up with his unstoppable snoozing also… So, it should be “the 1001 condition of Excalibur”
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Part 2. Afterstory
By the way, actually Jeanne d’Arc (the national heroine of France in A.D. 15th century) and Napoleon Bonaparte (The Emperor of France in A.D. 19th century) had come to find Excalibur also. Being annoyed (Due to the condition requested by Excalibur) and made fun of by Excalibur (One is mocked as tomboy, another shorty), they just left.
That’s why he is not pulled out…