|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|
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 also 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. She says that Yuri is like a villain when Yuri laughs maniacally during the Baseball tournament, and as she starves after Operation High Tension Syndrome
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".