Katase Akari (片瀬朱里) is a former 4th generation member of AKIHABARA Backstage pass.
- Name: Katase Akari (片瀬朱里)
- Nickname: Akarin (あかりん)
- Birthdate: September 20, 1993
- Birthplace: Tochigi Prefecture, Japan
- Hobbies: Shopping, Karaoke, chatting with friends
- Favorite Color: Pink
- Favorite Idols: Kojima Haruna, Watanabe Miyuki
- She's currently a 2nd year college student.
- She has been imitating Watanabe Miyuki since she was 16 years old.
- She has recently been into collection accessories.
- Within the current cast, she admires Arita Ria, Ayashima Yuka and Kurase Hinami.