The titular character of [[Tokuno Yuika]]'s series "I Want to Cure my Little Sister's Bratty Behavior!":[/pools/16409].

Character's profile from the first collected book:

[b]Age:[/b] 12
[b]Birthday:[/b] October 14th
[b]Height:[/b] 148cm
[b]Weight:[/b] 42kg
[b]Three Sizes:[/b] B82(B) W55 H84

A first year in middle school. Decided to make a precocious debut in middle school!
She's at that age where not only does she hate losing, but she just can't be honest either.
Really loves her older brother and constantly tries to monopolize him.
A serious student at school, she has both good grades and athletic ability.

The girl with the princess cut is how she looked in elementary school.
She appears in flashback scenes and photographs.
She was more of a spoiled crybaby back then than she is now.
宗方雛乃