I usually hate making a comparison between Yumeko and Sakuya (Yumeko is certainly much better IMO), but I get quite some Sakuya vibe with her short air, her stance and her saying "young mistress".
Hey, Yumeko-chan.Did something happen to her?... has found someone she likes.Eh!?Siiiigh...*squeezes*That's because it seems the young mistress...Alice-chan has been like that all the time lately.