|Club||Sports Club (Swimming Team)|
Asu has short blonde hair with an ahoge and bright blue eyes. She wears black and yellow shorts under her skirt and black wristbands with horizontal yellow stripes. She has tanned skin and wears yellow swimming goggles. She has a black and yellow jacket tied around her waist and wears the "Red Armband of Leadership" with a person swimming on her left arm.
"Asu is the president of the school's sports club. She's the top student athlete in the region, and many of her classmates predict that she'll be winning gold medals at the Olympics in a few years.
Asu won't actually appear at school until the fifth week of gameplay, but she will quickly make friends with Senpai. Senpai will be feeling drained after the last four weeks, and some exercise might be just what he needs to put his mind off of recent events.
Her cheerful and energetic nature makes it very easily for her to make friends - or find her way into someone's heart. Her easygoing attitude and glowing smile might steal Senpai's heart in no time at all..."
According to YandereDev, "She's perpetually positive and energetic." She could be described as a "Genki Girl".
She has a competitive nature which drives her to achieve the best scores, leading her to have the third best test scores among the rivals.
Though it is unknown at the moment, YandereDev has said that her routine will put her in close proximity to Senpai or other students.
As she will be a rival in the future, she will have a crush on Senpai.
If she entered a relationship with Senpai, he would become an athlete.
- Asu's name is a play on the word "Athlete" when transcribed into Japanese Katakana: Asurito (アスリート)
- Asu's name was mentioned in 2015 by YandereDev as a possible name.
- YandereDev's current reasoning for Asu being absent in the first 4 weeks of school is that she was training for the Olympics at a specialized institution.
- Originally, Asu may have been planned to be the fourth rival instead of the fifth, as in the original rival silhouettes she was placed fourth.
- Swimming is her favorite sport.
- If YandereDev had to replace a rival, he would pick her.
|“||Nobody in the sports club EVER turns down a challenge! Come on! Let's get started right away! ...Senpai...would you like to go for a run together...?...you know...just the two of us...?||”|
— Asu in "Yandere Simulator Rival Introduction Video". 
|“||Oh! Gosh! That's really nice of you! Thanks, I appreciate it!||”|
— Hypothetical dialogue of Asu reacting to someone giving her a flower.