Yukiho Kousaka

"'μ's10!'""-roll call"Yukiho Kousaka (高坂雪穂) is μ's10 of the Muse Rangers.

Personality
Unlike Honoka, Yukiho is responsible and level-headed but does care for her older sister. While trying to act all mature, she does embarrassing things when no ones around.

Background
Yukiho was born two years after her father's sacrifice. She acts as an 'older sister' to Honoka, scolding for her antics. When Honoka started high school at Otonokizaka Girls Academy, Yukiho didn't want to be in the same school as her as she doesn't want to be embarrassed by her older sister.

Yukiho becomes best friends with Alisa Ayase when the latter started her first year of middle school and eventually developed romantic feelings for her.

Yukiho had no idea of her older sister's identity as μ's1 until in Mission 15: Earning A Mother's Approval, when she learns of her identity and how their mother didn't want her to become a Muse Ranger. Despite not knowing her father, Yukiho convinced her mother that Honoka doesn't want to repeat the same mistake 17 years ago. Afterwards, Yukiho decides to enroll into Otonokizaka Girls Academy.

When Honoka got struck into a coma in Mission 32, Yukiho took care of her and learns that their father created the Battlizer Armour for Honoka to use.

In Mission 35: Two New Muse Rangers, Yukiho desperately wants to become a Muse Ranger but cannot join the Muse Agency as she is underage. She finally μ's10 alongside Alisa, who became μ's11, after Chief Akira Suzuki let them be.

In the final battle, μ's10 and μ's11 helped the civilians get into safety. They then witness the dimension explode in the sky. Yukiho thought her sister's dead but is glad that she and her team have survived.