Once Your Maid, Always Your Shield - Episode 4

Hailey is shoved out of her bedroom when Miss Natalie Smith, a noble, claims it and forces her into a storage room; servants mock and threaten her with homelessness while the parents are away. After the bullying, an ally admits, "You stood up for me, but I'm powerless to protect you," then reveals they carry the late empress's knowledge and a plan. They volunteer to teach Hailey music, art, and business skills so, as eldest daughter, she can press a claim on the Smith Group. The episode ends with their decision to train, the household power balance unresolved.