Arisa is an introvert whose hobbies include tending for bonsai plants and internet surfing. Even though she's basically a shut-in and admits to being lazy by nature, she still manages to achieve excellent results in school due to her intellect.
It was shown that in the past that Arisa was a loner who always did things by herself, and claimed not to need help from other people. However, after meeting Kasumi Toyama, she slowly started changing, showing her more of her kind side and interacting with other people as well. Due to her grounded personality, the other members of the band often tease her on friendly terms, though it doesn't stop her from getting frustrated.
Her best friend is Rinko Shirokane, fellow black pantyhose girls.