Yusa

Yusa (遊佐, Yusa) is a guitarist and singer who conveys the state of the battlefield to Yuri and acts as Yuri's personal secretary of sort.

Appearance
Yusa is a girl with long blonde hair tied into two pigtails, each secured in place by a red ribbon. Yusa wears many outfits (yellow T-shirt and long jeans in episodes 20-40 in season 3; yellow T-shirt and long golden rod pants in episodes 49-56 in season 3, black tanktop and white long pants in episodes 57-72 in season 3; episodes 22-25 in season 4; black t-shirt and white long pants in episodes 72-present). She also wears sketchers.

She is always seen wearing an earpiece with a microphone attached.

Personality
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 also hangs out with Yuri

Angel Beats!
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.

Not much is known about her past; and how she died, when she ended up in the Afterlife, or what her regret remains a mystery. However, given the fact that she has a strong hatred against men and will brutally murder them. Shows that she may have been physically or sexually abused by them (possibly raped), a possible clue to her suffering and regret.

iOS X
Yusa was born in Tokyo, Japan, in 1996. She began her journey with the iOS Team in 2013.

Trivia

 * Yusa used to play a Eastwood Airline H44 DLX Electric Guitar, but now she plays a Ibanez GRGM21 Mikro Yellow Electric Guitar.
 * She also sing while playing the guitar.
 * She transformed into Tyras after Within Temptation's concert on June 13, 2014.