- Stage Name: Kikkawa You (吉川友)
- Real Name: Kikkawa Yuu (吉川友)
- Nickname: Kikka (きっか)
- Birthday: May 1, 1992
- Birthplace: Ibaraki, Japan
- Blood Type: A
- Height: 160 cm
- Favorite Food: Fruits, cherries
- Least Favorite Food: Red bean paste (anko), green peppers
- Dislikes: Kanji
- Specialty: Arm-wrestling, basketball, neatly cutting cabbage
- Looks Up To: Kusumi Koharu, Natsuyaki Miyabi
- Hello! Project groups:
- Up-Front groups:
In 2008 she was chosen, along with fellow Egg Kitahara Sayaka, to be part of the anime-based group MilkyWay with Morning Musume member Kusumi Koharu. She also provided the voice of the corresponding character in the Kirarin Revolution anime series.
In 2010 it was announced that she had finished her Hello! Pro Egg training, and her next activity was performing as the opening act during the Hello! Project 2011 Winter concert tour. During the tour the "Kikkawa Yuu Support Project" was announced, and a website for her was opened.
On February 26, 2011 at a press conference it was announced that Kikkawa was to debut on March 30 with her debut single "Kikkake wa YOU!" which would be accompanied by 3 b-sides, all of which were performed at the Hello! Project 2011 winter concert tour. It was also revealed through Hello! Project's official site that the single would be released through Universal Japan. It was revealed on the same day that Kikkawa would perform at the "UNIVERSAL DREAM LIVE 2011" along with KARA, BEAST, and SDN48. A documentary movie that show her road to debut was also announced. The movie, Kikkake wa YOU!, featured backstage dance lessons, photoshoots/PV shoots, press conferences, and other material.
- [2013.08.07] Best of YOU!
- [2012.11.07] Vocalist? (ボカリスト?)
- [2011.05.11] Kikkake wa YOU! (きっかけはYOU!)
- [2011.10.05] Hapirapi ~Sunrise~ (ハピラピ)
- [2011.12.28] Konna Watashi de Yokattara (こんな私でよかったら)
- [2012.07.11] Koko Kara Hajimarunda! (ここから始まるんだ！)
- [2012.09.26] Darling to Madonna (ダーリンとマドンナ)
- [2013.01.16] Sekaijuu ni Kimi wa Hitori Dake / Valentine's RADIO / Chocolate Damashii (世界中に君は一人だけ/Valentine’s RADIO/チョコレート魂)
- [2014.06.25] URAHARA Temptation / Ii jan (URAHARAテンプテーション/いいじゃん)
- [2014.10.29] Amai Melody / "Suki" no Kazoekata (あまいメロディー/「すき」の数え方)
- [2015.05.06] Hana (花)
- [2016.06.01] Ha wo Kuishibare! / Charming Shoubu Sedai (歯をくいしばれっっ！/チャーミング勝負世代)
- [2017.05.24] Sayonara, Standard (さよなら、スタンダード)
- [2018.01.17] Tokimeita no ni Through / DISTORTION (ときめいたのにスルー)
- [2011.08.17] Kikkawa You YOU! ~The DVD~ (吉川友)
Compilations / Other
- [2008.08.27] Kirarin☆Revolution Song Selection 4 (#5 Anataboshi (Cobeni Ver.), #8 Sansan GOGO (Cobeni Ver.))
- [2009.03.18] Kirarin☆Revolution Song Selection 5 (#6 Hate Hatena)
- [2011.08.17] YOU
- [2013.05.01] YOU21
- TV Dramas
-  Suugaku♥Joushi Gakuen (数学♥女子学園)
-  Sprout
-  Hancho 6 (ハンチョウ6)
-  Kanpai Senshi After V (乾杯戦士 アフターV)
- TV Programs
- [2008–2009] Kirarin☆Revolution (きらりん☆レボリューション) (as Hanasaki Kobeni)
-  Sengoku Collection (戦国コレクション) (as Beethoven)
-  Cat's Eye Club 2
-  Tiger Breathing (タイガーブリージング)
-  Recipient (レシピエント)
-  Kawaiku Nakuchaikenai Ryu (カワイクなくちゃいけないリユウ)
-  Okashi na Okashi na Tantei Monogatari!... wa, Kore da!! (おかしなおかしな探偵物語!...は、コレだ!!) (as guest)
-  Yane no Ue no Violin Hiki (屋根の上のバイオリン弾き)
-  Kurukuru to Shi to Shitto (くるくると死と嫉妬)
- Was one of the eight Hello! Project members to lose a Morning Musume audition and be added to Hello! Project at a later date (the other seven being Fujimoto Miki, Satoda Mai, Miuna, Iwashima Manami, Suma Ai, Otsuka Aina and Mogi Minami).
- Respects Kusumi Koharu and Natsuyaki Miyabi.
- Made her first concert appearance at Dai 1 Kai Hello! Project Shinjin Kouen ~Saru no Koku~ / ~Tori no Koku~.
- Kikkawa appeared as a backup dancer in the PV for Mano Erina's eighth major single "Genkimono de Ikou!".
- While acting as the opening act during the Hello! Project 2011 Winter concert tour she performed three songs titled "Sayonara Namida" (さよなら涙), "Candy Pop", and "Fuyuzora Hanabi" (冬空花火).
- During the 2011 Winter Hello! Project concerts her name was for the first time romanized as "Kikkawa You".