bubble girl
A Boku no Hero Academia character created by Abara Chiita as part of a Pixiv contest. As she was the winner, Bubble Girl became part of the series' universe as of Chapter 126. She serves as Sir Nighteye's sidekick.
Real name appears to be Awata Kaoruko.
See also
- post #2630945 and post #2630943 - Original concept and winning entry