Lyseria

Lyseria is a Sorceress Einherjar in Valkyrie Profile.
Little is known about Lyseria's origins or her life, other than the fact that she appears to be descended from Mimir, a deity of wisdom and the ancestor of the Vanir. She lived hundreds of years prior to the game's events, at the time when Midgard was created, and was a very skilled sorceress with prophetic powers, most likely because of her ancestry. However, she feared these powers and thus decided to take her own life and seal herself inside a giant crystal within the Arkdain Ruins, believing that there was no place for her in Midgard or any other world. Grey eventually managed to locate the crystal during his attempt to reverse the ritual of Soul Transfer that was keeping him alive, possibly aware of Lyseria's magical talents. It is unclear whether he used the crystal, or, if so, how he did, but his endeavour was unsuccessful.
Seeking a way to gain more of an edge in Ragnarok, Odin ordered Lenneth to find Lyseria. Travelling to the Arkdain Ruins, the Valkyrie called her soul out from within the crystal. Seeing this as the perfect opportunity to be rid of her anguish, Lyseria attacked. Lenneth defeated her and recruited her.