- Real name: 趙國蓉 (Zhao Guo Rong)
- Taiwanese nickname: 燈泡 (Deng Pao) (light bulb)
- Japanese nickname: ヨウコ (Youko)
- Flavour: Strawberry (pink)
- Birthday: August 28, 1992
- Astrological Sign: Virgo
- Blood type: A
- Hobbies: Singing, chatting, sleeping, laughing
- Dislikes: Being home alone
- Fears: Loneliness, being home alone, house sitting
- Favorite Food: Custard/pudding
Zhao Guo Rong, better known in Japan as Youko, is a member of Ice Creamusume. She was announced as a winner of the Taiwan Hello! Project New Star Auditions on September 20, 2008 along with the other members of Ice Creamusume.
- Youko has a younger sister.
- Youko gained her nickname “Lightbulb” because of the way she answered questions and acted on New Star, turning “on” and “off” like a lightbulb.
- Youko is part of a “family” (started on the girl’s blogs) consisting of her (Mother, Minnie), PeiPei (Father, Shin-chan), ReiRei (Daughter, Positive), and sometimes Aiko (another Daughter).
- Youko’s favorite Disney movie is “The Little Mermaid”. She also loves the Disney character Minnie Mouse.
- Youko attended Junior High in Canada.
- Tsunku’s comments on her: Matsuura Aya songs are harder to sing than they look, and she got the melody and Japanese correct. He noted that she lost a lot of weight in 3 months and asked if she got in, if she would put back the weight she lost in a month and she said no. The host then suggested she should ask Tsunku what they will be eating in Japan.
- She wanted him to ask for her so they ended up doing rock-scissors-paper. She lost so she asked Tsunku what they eat for breakfast lunch dinner. Tsunku said breakfast is nattou, lunch is curry rice, dinner is nattou. The host asked if it’s what Tsunku personally likes to eat, and he replied everyone in Morning Musume eats this too. Lightbulb said she’d be able to cope with the menu.
- Ice Creamusume (2008-2011)