I Have Seven Senior Sisters, and They're All Invincible

Any Stories About a Sister Who Spoils Her Brother but Punishes Him Harshly When He Makes Mistakes?

An older sister punishes and spoils her younger brother.

The God of War Returns to Find His Seven Sisters, Who Aren't Blood-Related

An Invincible, Fiercely Protective Female Master and Her Unruly, Gifted Disciple

Any stories with an incredibly powerful master who fiercely protects their disciple? The protagonist should have exceptional talent, be free-spirited, and not worry about retaliation after stirring up trouble. I don’t want a protagonist who goes through all kinds of hardships, but one who gradually grows under their master’s protection. Not interested in harem stories.