|Japanese Name||君島光 （きみしま ひかり）|
|Romanized Name||Kimishima Hikari|
|English Name||Hikari Kimishima|
|Debut||Episode 01 - The Indelible Dream|
|Japanese Voice||Akemi Kanda|
|English Voice||Tiffany Terrell|
Hikari Kimishima is one of the current members of the group AKB0048. On Akibastar, she is known as Yuuko Oshima the 9th (大島優子 （おおしま ゆうこ）), also known as Yuuko (ゆうこ).
Yuuko has short, brownish orange hair and side ponytail with three braids going across her ponytail and has brownish orange eyes. Like all members of AKB0048, She has a heart-shaped lining on her hair and eyes.
Yuuko has an energetic, outgoing, upbeat, and mischevious personality. However, when she needs to be, she can be very serious and determined. She always tries her best to receive the Center Position. She always tries to cover up her frustration and anger.
- Her name Hikari means light.
- There was a girl who was the 8th Yuuko Oshima for at least 3 years before Hikari succeeded the name.
- It is revealed that she ranked 2nd in the early results of the General Elections. However, in episode 4, at the General Elections with the final results, she ranked 1st.
- She and Chieri both have a similar fringe.
- She likes peppers.
- Since she is from the 72nd Generation, she became an understudy when she was 13 years old.
- In episode 12, it is revealed that even though she met the conditions to initiate her as a Center Nova, but she never fully obtained Center Nova because she did not disappear like one as concluded by Tsubasa and Mii-chan.
- She and Kojiharu are from the same generation, however, Yuuko became a successor first.