In the Dimension of Disaster quest, you will need to purchase a full black outfit [Hood, Robe (top),and Robe (bottom)] for 90 Zemomarks, purchase a full Zombie outfit for 500 Zemomarks, and talk to her about dyes to obtain the Yellow and Blue dyes.
In Heartstealer you will purchase Masquerade masks from her.
She also runs the Varrock Fine Clothes Shop, which stocks a variety of different clothes and basic Crafting equipment including:
|Black wizard robe skirt
|Wizard robe skirt
|Priest gown (bottom)
|Priest gown (top)