She appears as a Rare Partner available in Yu-Gi-Oh! Duel Arena, with a default of 4 Rental Points. Her partner ID is P031. She also appears as an opponent at Stage 7-1 under Quest mode.
However, she also appears throughout the game to help the player in the Tutorial Duels, and makes appearances giving messages explaining what to do in certain menus, or warning that the player is already performing a certain action when they start a new one.
The beloved and only pupil of "Dark Magician", and successor to all of his power.
So nice to meet you! Can you defeat the combination of me and my master?