Hirajima Natsumi

 (平嶋 夏海) was born on May 28, 1992 in Tokyo, Japan. She voices Seto Rika and is a member of Merm4id. She is affiliated with One Eight Promotion agency.

Biography
Natsumi made her debut in October 2005 as a member of popular idol group AKB48. She created many albums with the group, as well as a sub-unit called "Watarirouka Hashiritai 7". Years later, she was involved in a scandal due to having violated the "no-dating rule". As a result, she decided to retire from AKB48 and Watarirouka Hashiritai 7.

After her departure from AKB48, Natsumi continued her showbiz career mainly as an actress, gravure idol, and TV host.

Rika is Natsumi's debut role as a voiceover artist.

Trivia

 * Natsumi was born to former surfers, who named her hoping she would shine as brightly as the summer sea (夏海).
 * Natsumi's hobbies include collecting manga and teddy bears, and sleeping
 * She claims that she can immediately fall asleep anywhere, even in the bath.
 * Natsumi has one older brother and one younger brother.
 * Natsumi was the student council vice president in her first year of middle school
 * Natsumi was on the basketball team in middle school.
 * Natsumi is an experienced motorcycle rider, and obtained her unlimited motorcycle driver license on July 28, 2017.
 * In addition, Natsumi is also skilled at unicycle riding.
 * Natsumi's favorite foods include liver sashimi, yukhoe, clams, engawa, sweets, pione grapes, sweet tamagoyaki, and boiled pumpkin. Her least favorite foods are fish balls, spicy foods, and other foods she considers that doesn't taste good.
 * Natsumi describes herself as someone who grows through accepting criticism, and notes that she has a difficult time dealing with praise.