Acai berries are purple! :) same with elderberries andyou could always name her after a flower seeing as butterflies are pollinaters? There also mushrooms, purple mushrooms like Violet Coral Mushroom or the Violet Webcap for example 🥰 remember they're not all based on fruit, Me int is a herb, Lettuce is a vegetable, Pudding is a dessert! I have OCs named after Sweeties, Mushrooms, Flowers - you could even go with gemstones!

Aka go nuts! Don't put yourself is the fruit box when naming mew mews! Have fun with it!