|“||Never heard of any of 'em!||”|
Osano is a light-skinned teenager with bright, pickle colored eyes and chin-length, messy brown hair styled in frayed bangs. The locks curl outwards, except for the ones that frame either 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.
Osano is very laid-back, speaking casually to and teasing even her captain Kōtarō Suwa and older agents.  Occasionally she can be seen pumping her fist in the air enthusiastically. She likes tidiness, and habitually chews on the lollipops Konami once bought.
The members of Suwa Squad have a good relationship and hang out together outside of Border duty. 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.
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.
Fuyushima and Osano occasionally play mahjong together. He is normally the best player among those who visit the room of Suwa Squad, but he becomes the worst when she joins in, presumably on account of his inability to defy high school girls.
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.
As the Operator of a moderately successful B-rank Squad, Osano is a competent multi-tasker. She is known to be endowed with incomparable instincts.
|Trion Power||Machine Operation||Analysis||Parallel Processing||Tactics||Command||Total|
|Border Briefing File||4||7||6||9||6||6||34|
- "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!"
- Osano likes stir-fried udon, mahjong, and foreign novels.
- In the anime the members of Tamakoma Second struggle to pronounce her surname.