Yuko Oshima

Yuko Oshima (大島 優子, Ōshima Yūko, born October 17, 1988 in Tochigi Prefecture) is a member of Japanese idol girl group AKB48, of which she is the captain of Team K. She is also a member of the AKB48 subunit Not Yet. Outside of singles that involved rock-paper-scissors tournaments, she has sung on the title tracks for all of AKB48's singles since "Aitakatta" in October 2006. She has placed among the top two for the annual AKB48 general elections from 2009-2013.

Oshima was born in Yokohama, and was raised in Tochigi Prefecture. Her mother is from Hokkaido. In 1996, she signed as a child actor with Central Kodomo Gekidan. In 2005, she began working as a junior idol in a short-lived idol project Doll's Vox, which was produced by The Alfee vocalist Toshihiko Takamizawa. In 2006, at the AKB48's second audition to form Team K, she was selected out of a pool of 12,000 applicants to join the team. In April, she began working full-time with the group, which debuted with the single, "Aitakatta", in October 2006.^{[citation needed]}
On August 24, 2012, AKB48 announced a reorganization of the teams, and appointed Oshima to be the captain of Team K.
On December 31, 2013, Oshima announced on Kohaku Uta Gassen that she would be leaving the group.

Oshima has placed in the top two in the past five AKB48 general elections. In 2009 she placed second overall, losing only to Atsuko Maeda. In 2010, she received the most votes and became the center performer in the single "Heavy Rotation". In the 2011 general election, she placed second to Maeda once again. In the 2012 general election, she placed first with 108,837 votes. for the 2013 general election, she was voted second overall with 136,503 votes and lost to Sashihara Rino with 150,570 votes.

Reference: Wikipedia

Yuko Ogura

Yuko Ogura (小倉 優子, Ogura Yūko^?, born November 1, 1983 in Mobara, Chiba) is a Japanese gravure idol and model who typically aimed for the cute, innocent schoolgirl look prior to her 2011 marriage.
Ogura regularly, if not entirely seriously, claims to be one "Princess Apple-Momoka" (りんごももか姫^?) of the apple-shaped planet Korin. This is apparently an in-joke dating back to her middle school days. Having an alternate name was trendy at one point, and one of her friends told her that she looked like a Momoka. She liked the name and still uses it today.
She is known outside of Japan for her song "Onna no Ko ♡ Otoko no Ko" (オンナのコ♡オトコのコ^?, "Girls ♡ Boys") which is the ending theme of the anime School Rumble.
She married Isao Kikuchi on October 10, 2011, in Hawaii. Her first child was born in 2012. She has written a book about motherhood.

Reference: Wikipedia

Umika Kawashima

Umika Kawashima (川島 海荷, Kawashima Umika, born March 3, 1994 in Saitama Prefecture, Japan) is a Japanese idol, singer, and actress. She is a member of the Japanese girl group 9nine. As an actress, she played in numerous Japanese TV series and movies.

Reference: Wikipedia

Sun Li

Betty Sun or Sun Li (born September 26, 1982) is a Chinese actress.
She first entered show business by participating in 2001's Star Search, held by Singapore's MediaCorp. She reached the finals and although she was not placed in the final rankings, she earned the praise of judge Andy Lau.
In 2003, author and TV producer Hai Yan (海岩) selected her for the female lead in the TV drama version of Jade Goddess of Mercy, after which Sun became recognized as one of the most promising young actresses in China.
She mainly gained fame in China with the 2007 TV series Once Upon a Time in Shanghai (a mainland remake of the Hong Kong version made 25 years earlier). In 2008, she notably portrayed the heroine Little Tiger in the acclaimed mini-series Iron Road, only the second joint venture created under Canada/China co-production treaty established in the 1960s. In 2011, she played Zhen Huan (甄嬛) in the TV series of Hougong Zhen Huan Zhuan.
Sun has been married to the actor Deng Chao since 2011.

Reference: Wikipedia