Birth Name: Lee Seungjun
Birthday: January 13, 1995
Zodiac Sign: Capricorn
Position: OFF Team Leader, Lead Dancer, Vocalist, Rapper
MBTI Type: ENFP
- J-US's nicknames are Spark Leader, Maltese, and Juice.
- His stage name means "Seungjun and ONF together".
- Some of his hobbies are reading webtoons and watching dramas.
- His favorite color is purple.
- J-US wanted to be a table tennis player when he was younger.
- He has been best friends with Hyojin for over 14 years.
- J-US has a white poodle named Vell.
- He didn't get his ears pierced until he was 20 years old.
- J-US trained for 5 years before debuting in ONF.