Name: Kim Jaejoong (김재중)
Stage Name: Hero
Vocal Position: Lead
Group Position: Mother
Birthday: January 26th, 1986 (Real Birthday is February 4, 1986, confirmed by his mother)
Height: 180cm
Weight: 63kg
Blood Type: O
Birth Family: Mom, Dad, Younger Sister & Younger Brother
Adoptive Family: Mom, Dad, & 8 Sisters
Hobbies: Cooking, Weight Training, and Composing
Religion: Christian
Education: Graduated from high school, but no information as to university.
Close Friends: Kim Hyun Joong (SS501), BoA, TOP (Big Bang)
Favorite Number: 2, 7, and 333333333333… (infinite)
Favorite Food: —
Favorite Singers/Celebs: KangTa, Yoo Young Jin, Fany, WheeSung, Yumi, Yolanda Adams, HOT
Favorite Sport: Badminton
Favorite Colors: Black and red
Dog: Vick

• Sang “Greeting” (인사) which was featured on the A Millionaire’s First Love soundtrack.
• Collaborated with The Grace for “Just for One Day”, which was featured in The Grace’s first Japanese full-length studio album, Graceful 4.
• Composed “Kissしたまま、さよなら” with Yuchun.
• Sang Japanese solo “MAZE”, which was featured in the “Keyword / Maze” single, the fifth and last installment of the group’s “TRICK” series.
• Sang Korean solo “잊혀진계절 (Forgotten Season)”, a remake of the original song by Lee Yong, which was a famous hit in the 1980s. His solo is included in TVXQ’s 4th album MIROTIC (Track 11).
• Wrote the lyrics for the his rapping refrain in “Wrong Number”.
• Acting as the leading role in the teledrama “Heaven’s Postman”.
• Composed and wrote the lyrics to “사랑아 울지마 (Do Not Cry My Lover)
• Wrote and composed 忘れないで (Don’t Forget)
• Arranged and composed 9095