Also known as: リーセリア・レイ・クリスタリア
The female protagonist of Seiken Gakuin No Maken Tsukai.
Lyseria is the girl who unwittingly undid the seal on Leonis's mausoleum and nearly died protecting him from a Void; left with no choice, Leonis "heals" Lyseria with the only spell he is certain would work, the tenth-order spell "Create Elder Undead", a spell that worked so successfully on Lyseria that she returned to life as the strongest undead being, a Vampire Queen.
Voiced by Ishikawa Yui