Yu Matsunaga

Yu Matsunaga (松永悠 Matsunaga Yū) is a supporting character in 22/7. She was a friend Jun made during her time at the hospital. She is voiced by Aimi Tanaka.

Appearance
Yu had short, dark grey-green hair that reaches just below her shoulders. She had cool green eyes.

In Jinsei wa Waltz's MV, a theoretical future Yu can be seen alongside Jun, where her general appearance stays the same, although she is noticeably taller than Jun.

Personality
A cheerful and bright girl even in the hospital, Yu was a carefree girl who always had fun. She was friends with all of the kids at the hospital, and even managed to befriend the gloomy girl Jun.

Biography
Although it is not disclosed what kind of illness Yu had, it was serious enough that she had to be hospitalised, and would later presumingly die from.

Jun Toda
When Jun was 10 years old, she met a girl called Yu due to sharing the same hospital room. With Yu's bright personality, Jun wondered how she was always happy all the time, to which Yu replied that she thought of the hospital as an amusement park. As they spent more time together, Yu helped change Jun into a cheerful person like herself.

However, once Yu got her own hospital room, the two weren't able to see each other as much. One day, when Jun was walking to her room to give a letter to Yu about how much she made staying in the hospital much more fun, she stumbled upon Yu's mother crying a top Yu's lifeless body. Petrified, Jun ran away crying up to the rooftop and expressed about how Yu deserved to live way more than herself, and begged to exchange her life for Yu's. When Jun found out she had been cured from her asthma days later, she took it as a sign that she had received Yu's life and decided to live life to the fullest.

Tomoe Matsunaga
Assumed as an older relative, Yu used Tomoe's karaoke card in order to sneak into a karaoke place with Jun.

Etymology
Matsunaga (松永): Matsu (松) means "pine" and Naga (永) meaning "long".

Yu (悠) means "permanence".

Quotes

 * "Well, I think life is like an amusement park. Injections are like a roller coaster. Medications are like haunted houses! You've just gotten to an amusement park. Having a sad face at one of those is such a waste." Yu to Jun, episode 7

Trivia

 * The meaning of Yu's name, permanence (meaning endlessness, immortality, etc), may be ironic for her dying so young, and/or may also be a reference that Yu's soul will always live within Jun's heart.