Murasaki (original demon)

( I'm considering adding characters from others things at the very least there appearances and some of the abilities that could be possible Within Demon Slayer )

There exists a demon called Murasaki (Japanese word for purple) he was named as such due to his appearance of purple hair and eyes and he even took it upon himself to wear purple clothes just to be the embodiment of his name. He's the second oldest demon so he is at least over 800 if there were any older than him they're dead besides Muzen (Muzan is somewhere between 900 and 1,000 years old if not a little older)

Blood demon art: is called alter or change it allows him to alter or change not only himself but other people as well as things. ( note his Blood Demon art it quite literally allows him to change his body and the body of others an example of this would be changing his own gender as well as other physical characteristics this also includes other people not only that he can Alters things the best example of something similar to it would be Alchemy from Fullmetal Alchemist . He also managed to learn how to turn people into demons)

Backstory

He was raised in service of the Lord to do whatever the Lord wanted he also was the Lord's best servant anything he wanted he provided women **** or otherwise, Villages exterminated merchants and Rivals assassinated an item wanted got by any means necessary. Time went by the Lord's son took over and the Son feared him thus sent him on a suicide mission of a prominent nearby Lord he completed the mission but was going to die from his wounds Muzen happened upon him and turned him into a demon because he never had a name muzen gave him the name Murasaki the first thing he did after becoming a demon was devour the Lord's son ironically enough he actually gained Independence as well as a sense of humanity after becoming a demon which eventually led to them going their separate ways although both still have a weird sort of respect for one another. Musen views Murasaki as the only demon to ever be his equal while Murasaki although having different views on demons than Muzen respects him for giving him the chance to actually live. Also at some point after splitting with muzen he became a lord (on a side note the reason why I say he got a sense of humanity is because after becoming a demon he actually started to care and feel emotions while when he was human and still under the Lord and his son he was more or less a tool that didn't really feel anything and simply did what they told him)( if you're also wondering about early Muzen personality is he have the same mentality as he does present Muzen)

Skills : he is skilled in hand-to-hand combat swordsmanship and spearmanship he's also able to use his own breathing techniques ( for now it's called breath of Darkness may change though or he'll just know multiple breathing techniques of different styles) (on a different note he's actually skilled in various weapons and fighting styles after all he has lived a long time)

Items in his possession are demon slaying sword purple of course as well as a demon slaying spear again purple ( these two things are special as they're a mix of the normal ore used in Demon slaying as well as my own made up ore that absorbed Moonlight instead of sunlight so they're made with both)

( there's anything you think I should add or or take away I can hopefully I didn't forget anything note that he does have a number of female demons and humans under him)( another thing you want to think of is when you are creating things for him you can start him off at any point in the timeline so you could do it when he was still under the service of the Lord and build up everything or just put them in Demon Slayer present or maybe take it from when he's separated from muzen)