|“||You were awesome just for going 1 versus 4. I'm the one who did nothing at all... Wuuuaaahhhh...||”|
Akane is a short girl with bright red hair tied in twintails on the lower back of her head. She has large, round magenta eyes. She usually wears a purple cabbie hat on her head.
In Trigger Mode, she, along with her teammates, wears a white body-fit armor over the top half of her body with purple gloves, a belt that wraps partially around her waist, and a shoulder strap exposed on her right side. This is connected to short black pants that then connect into long purple boots.
She is very fond of her teammates, crying when she learned that she would be moving, which would lead to their separation, also showing that she cries easily. She is also very daring, seen how she shot at Yūma despite the risk it posed if she missed. She also adores cats, coming up to one no matter where it may be. She is also short-tempered.
Nasu is Hiura's captain, who she respects and looks up to, and also the cousin of her mentor.
Kumagai appears to be an older sister figure to Hiura, although they appear to fight often.
Her unit's Operator, who has the habit of teasing her.
They also meet in the Sniper training, with Akane getting interested in her cat. They quickly befriend each other.
He is Hiura's mentor and Nasu's cousin. She is proud of being his student and the fact he's always no. 1 in trainings, although reveals to her that the score isn't enough to test someone's skills, showing that Tōma and Ema are better than him despite getting lower scores.
They have a good relationship, but she envied him for the fact Natsume's cat landed on his head.
Like with Chika and Natsume, she met him in Sniper training. She was impressed with his sniping skills.
- (To Rei Nasu) "You were awesome just for going 1 versus 4. I'm the one who did nothing at all... Wuuuaaahhhh..." 
- "Akane" (茜?) means "deep red" or "madder". "Hiura" (日浦?) means "sun shore" or "sun riverbank".
- She likes collecting hats, cats, and soft serve ice cream.
- Before Chika and Izuho joined Border, she was the youngest female sniper.
- She is the younger sister of Kumagai’s classmate, but doesn’t know that her own brother is in love with Kumagai.