Lydie Erlanger was the childhood friend of Juste Belmont and Maxim Kischine. During the two heroes' years of strict physical training, her presence was always both comforting and invaluable to them. Lydie, really, meant everything to them.

After the falling out between Maxim and Juste, whence Maxim found himself under the possession of the Dark Lord's spirit, she became a pawn in the battle between good and evil. Because he could not suppress the possession, Maxim kidnapped Lydie and brought her to Castlevania, where she would surely be served up to the dark forces as the key element in the resurrection of Dracula.

Lydie awoke from an unconscious state only to find herself stashed away in the second of two castles, for reasons of which she wasn't yet aware. She remained there until Juste finally located her. Unfortunately, Death, who had also been scouring the castle trying to locate her by the whole time trailing the young Belmont, grabbed Lydie in his skeletal arms and took her away.

She was taken to the heart of the second, transient castle where the possessed Maxim would finish the ritual by offering her up as a sacrifice. Juste, who had located Dracula's remains and thus used them to break the seal leading to the castle center, showed up in the nick of time, and he beat some sense into Maxim to the point where a fleeting Dracula had no choice but to escape from this battered host or risk being vanquished prematurely. Lydie was now safe, and she escaped the castle with the now-sane Maxim. There she waited with Maxim, joined eventually by the victorious Juste.

On behest of Juste, who wished to save face for his friend, Maxim never told Lydie about the kidnapping or the proceeding events.