Yaya Tushan

Tushan Yaya is a deuteragonist in the Fox Spirit Matchmaker series. She is a nine-tailed fox and is also the Leader of the Demon Realm. After her sister, Tushan Honghong, went missing or died, she became the most powerful fox spirit in Tushan.

Although she appears arrogant and indifferent, she is very proud and looks up to her older sister as an idol because of how powerful and inspirational she was. As a result, she doesn't treat her extremely weak, youngest sister, Tushan Susu, very well because of her resemblance to Honghong.

(Source: foxspiritmatchmaker.wikia)