|Name in Japanese||遊佐|
|Debut (Anime)||Episode 01|
|Voice Actor (Japanese)|| Makino Yui|
|Voice Actor (English)||Serena Varghese|
|Affiliation/s||Afterlife War Front|
|Final Appearance||Episode 11|
In Heaven's Door, she was once a girl who used a pair of scissors to display her intense hatred towards males, responsible for a chain of murders involving the male student population of the Afterlife School. After receiving words of reassurement from Yuri, she joins the SSS as one of its first members after its founding.
Yusa is a girl with long blonde hair tied into two pigtails, each secured in place by a red ribbon. Just like most of the members of the SSS, Yusa wears the standard uniform of the group. She also wears brown stockings and black loafers.
She is always seen wearing an earpiece with a microphone attached to it or carrying a walkie-talkie.
She is a calm and gentle-mannered girl with a straightforward character. Much like Kanade, she doesn't show any emotions and she was called scary by Otonashi and Hinata. She rarely talks, but she sometimes hurt others feelings even though she doesn't mean it. It seems that she love her headphones so much, as she can't do her mission without them.
Among the known members of the SSS, she is the only one not shown inside the headquarters for most of the time; it is probably because of her job as Yuri's eyes and ears.
- Yusa has the same voice actor as Mei Sunohara from Clannad. Mei's older brother, Sunohara, also shares a voice actor with Naoi.
- Yusa was a contestant of the voting contest Anime Saimoe Tournament 2010 but lost to Mizuki Himeji in the first round of the main tournament.
- Unknown to the SSS members, she participated in Operation High Tension Syndrome, although her participation is not noticeable.
- Her name can be translated as "playful assistant".