Ivy

The Twisting Blade Of Solitude
An orphan who was adopted by an extremely rich family of London and lived a happy life. That is, until her father fell ill, he then suddenly became obsessed with extending his life and started searching for "The Key to Eternal Youth", and without a single care he wasted all the family's money and left Isabella Valentine and her mother to die, the latter who did so shortly after. Ivy entered her father's alchemy laboratory and found the item he was searching for was the legendary Soul Edge, she then chose to become an alchemist in name of her father and find the Soul Edge. During her investigations, she found the terrible truth: the Soul Edge was a wretched evil sword that feasted on souls. "My father was driven mad by such a loathsome thing...this evil sword!" Filled with rage, she named herself "Ivy" and swore to someday destroy that cursed sword. She created the whip-sword, and believing that a a living thing, only another living thing could destroy the Soul Edge, she, unsuccessfully, attempted to use alchemy to give her sword life, but after numerous failed attempts she switched to sorcery and tried to summon a demon and make a pact to give the sword life. She grew desperate as the nights passed by, until eventually a mutated, malformed hand appeared from the summoning circle and said: "I, Cross of the Pledge, shall confer upon thee the Point in the Escutcheon of Destruction - Dexter Purpure.". Ivy's sanity began to crack, until she noticed she had accomplished her goal and her weapon was "alive", and named it the "Ivy Whip".

On her journey, she bet the Innocent Darkside: Nightmare, the one who helped summon the life to the Ivy-Whip, she assisted him in killing the "seekers of the Soul Edge", soon after she discovered she was killing innocents and that Nightmare was the true owner of the Soul Edge. When she st out to end him, it was already too late, he had already been vanquished; and the evil sword, shattered. The weapon she had forged to wreck the cursed item was itself a creation of the curse; as it wasn't enough, researching the Soul Edge, she found the most terrible truth: her father was Cervantes de Leon, the original wielder of the Soul Edge.

She couldn't bear all the things that had happened and locked in her father's laboratory, seeking to destroy the cursed blade that she created, but she couldn't bring herself to actually do it. She emerged months later with renewed resolve: Not to destroy the cursed blade; but banish every aspect of it from this reality! She renamed her sword "valentine" as sign of her rebirth and set on on her new goal, but not only was she going to destroy the fragments of the blade that were around the world, but all who were touched by the blade's influence or even just seek to get it, none of them, not even the innocent, would be granted mercy; of course this would mean ultimately killing her sword and herself, but that would be the fate of her journey. However, this new resolution made her sword hard to control, and in turn made her notice that as an unholy item it wouldn't be able to destroy the Soul Edge, so she began studying the oldest book she had about the Soul Edge and found it to contain all the information about it, and found that one weapon existed to destroy it: the Soul Calibur. After extracting all the information of the book, a man walked into her laboratory, and being unable to control her weapon, was easily defeated, the man destroyed the book before her eyes claiming "the world didn't need this creation of his", as he left, he said "If you wish to learn everything about the cursed sword and the spirit sword, then follow the nightmare you know well" and set out to do that.

From her travel to what was once the Soul Calibur 's resting place, she learned her cursed blood won't allow her to wield this weapon, so she sought to use alchemy to create an homunculus with an artificial soul, however in the middle of it, her reanimated real father Cervantes appeared in her laboratory to reclaim her soul, as she couldn't fight back Cervantes consumed almost all of her soul, and left with no options she used the artificial soul to extend her life long enough to complete he mission, as with little of her soul remaining she hoped to be pure enough to wield the Soul Calibur.

Ivy rushed to Ostrheinsburg Castle, the place the blade once reside, and before reaching the blade faced her father, vanquishing him once and for all, and reclaiming her soul in the process, but before she reached the blade that was being reformed, it was destroyed by another hero. Knowing the most about the sword than anyone else alive, she knew it was not gone yet as it was merely bidding it's time before being rebirthed in the rift beyond. Ivy knew she had to reach this place and destroy it once and for all. Two mysterious men of her her world approached her, one quiet and wearing a mask, the other, interested in her research, explained her the nature of the place beyond the rift: Astral Chaos. She would spent the time after researching everything about a way to destroy the acursed Soul Edge and stop it's reign of chaos to the people of her world.

Season 3
After 10 years of research, she has finally found the way to transverse to the Astral Chaos, Using all of her knowledge, alchemy, sorcery, arcane arts and more, she makes a way for a body equal to her to exist in this place with alchemy, and sends her soul through a rift in reality. Afterwards, she arrives to this new world, and finds herself in the ring of TFR. Questioning if this was really the correct place, she senses a being with a soul as dark as the Soul Edge's Nightmare itself. She decides to participate in this even to learn more about this world and defeat the evil once and for all.