Rui Osano

"Never heard of any of 'em!"

- Rui Osano about the members of Tamakoma Second

Rui Osano (小佐野 瑠衣) is the Operator of Suwa Unit.

Appearance
Osano has green eyes and chin-length, messy brown hair styled in frayed bangs. The locks curls sideways, except for the ones that frame the side of her face. She is often seen sucking on a lollipop. In her trion body she wears the standard Operator uniform, with the addition of a set of headphones.

Personality
Osano is very laid-back, speaking casually to and even teasing her captain Kōtarō Suwa and older agents. She likes tidiness and has a habit of chewing on a popsicle.

Suwa Unit
The members of Suwa Unit have a good relationship and hang out together outside of Border duty.[BBF Q135] Osano speaks informally to her captain and does not refrain from taunting him if she is so inclined, although she still addresses him by his surname, while she uses nicknames for Daichi Tsutsumi and Hisato Sasamori, who in turn address her by her surname.

Reiji Kizaki
Like her teammates, Osano refers to Kizaki by his first name, which suggests familiarity. Nonetheless, she is respectful of him, protesting when Suwa referred to him with an unflattering moniker.

Shinji Fuyushima
Fuyushima and Osano occasionally play mahjong together. He is normally the best player among the ones who visit the room of Suwa Unit, but he becomes the worst when she joins in,[BBF Q71] presumably on account of his inability to defy high school girls.

Kirie Konami
Konami and Osano seem to know each other, since the lollipops that Osano is fond of come from a stash which Konami bought after being tricked into believing that they would increase her bust size, implying that Konami gave them to her.

Background
Osano was a fashion model until middle school, when she got bored and left the talent agency. She joined Border approximately three years before Chika Amatori and Yūma Kuga.

Large-Scale Invasion Arc
Osano assists her teammates during Aftokrator's attack. She activates Starmaker when Suwa and Tsutsumi hit the shell containing Enedra's vitals.

B-Rank Rank Battles Arc
On February 2, three days before their match against Tamakoma Second and Arafune Unit, the members of Suwa Unit gather to prepare a strategy in HQ's cafeteria. Osano states that she has never heard of any of the agents of Tamakoma Second. When Sasamori shows his teammates the footage of Tamakoma Second's first rank battle, she remarks that Chika and Yūma look very young. Three days later, when Tamakoma Second's map of choice is revealed to be Cityscape C, all of Suwa Unit is taken aback. Osano observes that since the spawn points are random, they still have a chance. Tsutsumi apologizes to her when he bails out, but she tells him not to worry since he scored a point. When the match is over, she chides Suwa for having failed to defeat a single opponent while Tsutsumi and Sasamori both did.

Abilities
As the Operator of a moderately successful B-rank unit, Osano is a competent multi-tasker. She is known to be endowed with incomparable instincts.

Quotes

 * "Never heard of any of 'em!"
 * "They're both puny."
 * (To Kōtarō Suwa) "Reiji is a smart beefcake."
 * (To Suwa) "Suwa got zero points! Tsutsumin and Hisa got one each!"

Trivia

 * Osano likes stir-fried udon, mahjong, and foreign novels.
 * In the anime the members of Tamakoma Second struggle to pronounce her surname.