sion eltnam atlasia
Main heroine of Melty Blood.
Born Sion Eltnam Sokaris.
If she loses herself, she will turn into a vampire (Sion Tatari). There is also a possibility she will turn into the Dust of Osiris in the far future. Sion also makes a guest appearance in Under Night In-Birth (named Eltnum).
An alternate version of her (still going by Sokaris) exists in Fate/Grand Order.