Kasumi lives with her parents and has a younger sister, Asuka - whom she calls "Aa-chan" - however it's not always clear who is the more responsible out of the two.
When she viewed the stars one night as a child, she heard a sparkling "Star Beat" and she's been searching for it. She believes that she found it after she made Poppin'Party.
Cheerful and always in high spirits, Kasumi is a playful, active and generally positive girl that always finds something to be excited about.
She is capable of sharing a mental wavelength with Kokoro, something nobody else seems to be able to do. She is also the type to believe in (or fall for) the strangest explanations.
She loves to tease Ichigaya Arisa, but given her kind personality, it's hard to tell if she is deliberately trying to provoke her or if she's oblivious. At times she can also behave melodramatically.
Kasumi has purple eyes and brown hair worn loose with segments pulled up into star-shaped buns. Her short bangs are framed by longer forelocks held by red star-shaped clips.
In her casual wear, she often wears a long blue button-up t-shirt dress accompanied by a yellow flannel tied along her waist. She also pairs it with a silver star necklace and a black watch.
In her first stage costume, she wears a white sleeveless collared shirt with red plaid cuffs and tie.
A list of characters Kasumi interacts with in the game.
- She is not a good swimmer unlike Asuka, who is a member of her school's swimming club.
- ESP Guitars has released a real-life version of Kasumi's guitar, Random Star, alongside Tae's guitar, Rimi's bass and other BanG Dream! merchandise.
- Even when it rains, her hairstyle, that looks like cat ears which is actually an image of a star, is never affected.
- She, along with Arisa, are the only members of Poppin'Party that interact with all other bands during Lives (and in the dialogues at the end of every game).
- She is one of the few girls unable to tell that the Student Council President and keyboard player of Glitter*Green was the same person until witnessing her remove her glasses.
- She's childhood friends with Kitazawa Hagumi, but Hagumi only realized it when Kasumi didn't have her cat ears.
- She has the same height as Hazawa Tsugumi, Maruyama Aya, Hikawa Hina, and Matsubara Kanon.
- ↑ http://www.espguitars.co.jp/bangdream/
- ↑ http://bang-dream.com/news/esp/
- ↑ http://bang-dream.com/instrument/