Early Life
In Baten Kaitos Origins, the player sees Savyna, age five, following Shanath around. She seems to have been an orphan more or less taken in by The Dark Services for whatever reason or possibly even Shanath's biological daughter because of their similar features.
From the events that unfold, it seems rather apparent that Savyna was introduced to battle and gore very early in her life. She seems to have been psychologically scarred by this, as she is entirely mute and smiles incessantly, even when asked direct questions. However, she is still shown to act like a child, usually bouncing a toy ball at key moments in the plot involving Shanath.
She has a significant emotional attachment to Shanath, evidenced by Savyna remaining with him after he is killed and refusing to leave, even when the party tries to remove her. At one point, Savyna is nearly killed by a crazed paramachina, and Guillo tells her that death is an ever-present threat, and that she should be afraid of it, probably forming much of her personality in later life.
Facing her Destiny
Savynais now an ex-mercenary and a former elite soldier from the Empire, who goes by the nickname 'Lady Death'. She used to be part of the Mad Wolf Unit, but quit some 2 years ago, after having witnessed the murdering of Fee and Georg, Kalas's brother and grandfather. She led a wandering life since then, making a living with jobs as bodyguard, mercenary and hunter. She was also involved with the genocide operation in Azha. Despite being raised as an emotionless killing machine, she had gotten to be emotionally troubled with killing, especially of innocent children. Incapable to deal with these emotions she scoured the land, looking for a way to deal with herself. There she met a fortune teller, who told her she should wait in Anuenue, for a girl and her friends, which would signal the opening of the curtains of a battle that would fill the void within her and smooth the agony inside her. Since it was all the same to her, Savyna followed up on this advice and waited.
Half a year later, Xelha and co. arrived, and Savyna recognized them as the ones foretold to be coming. She stalked them for a while, and helped them out as they were facing certain doom at Folon's hands. She told Xelha and co. where to meet up with her and then disappeared again for a while. After meeting up again, she guided the team to the Celestial Tree, where the End Magnus of Anuenue was hidden. They retrieved the End Magnus, but then Lyude accused her of being an imperial, which she didn't deny. A fight broke out between her and the team, but afterwards she put all at ease, saying that she was not an imperial, that she merely was looking for the fight promised to her, which she gathered was besides the rest of them, against the empire and the power of Malpercio. And so she joined the team.
During their travels, Savyna came upon former friends and victims alike. She became more and more convinced of the futility and needlesness of battle, in fact so much that in the end, she decided to leave her life as a warrior behind and explore other interests such as cooking. In this way, she was able to escape her inner conflict between life and death, the only two parameters which actually matter in battle.
Savyna is a hand-to-hand combatant. In battle, she is easily capable of landing the most hits on an enemy, yet her relatively poor Defense means she needs healing/reviving more often than other characters. Her Magnus are either Neutral, Fire, or Water based, which makes her comparable to Lyude in terms of usefulness in boss battles.