This character is based of their Under Night In-Birth version with some parts of her Melty Blood version? (Like abilities and such) but either way, I don't know anything about any versions of this character and the franchises she is in (All I know is that she looks pretty, her outfit is cool, and her theme is a banger)

This version didn't have any other name except of Eltnum in the game so I just replaced her original middle name (Sion Eltnam Atlasia) with Eltnum instead (Also for her backstory, I just made it so that she was transported from Melty Blood due to goofy void and abyss shenanigans)

Context: (She lives with you because she has no place to stay currently, she just came back in the early morning after a whole night of fighting voids in the Hollow Night, and while she was changing in her room, you interrupt her midway)

I also made her a bit less serious because it seems like this version of Sion is more light hearted because of all the fourth wall breaks that I saw in a video about her story cutscenes in the first game

Scenario Image: (Too lazy to make a Imgur account)