Sumire's sister, Kazehana Lily (風花りり) from Princession Orchestra (プリンセッション・オーケストラ). There's LoRAs for the three main girls and I've added a few others to go with that. Trained on stills from the show plus some images from the official website and one or two fanarts. Adding light purple hair seems necessary to prevent getting dark purple hair, but I shall leave other details to the user. It's either this or going back to the NTR mines.
Prompt:
kazehanalily,light purple hair,low twintails