YeoJin (여진), also known as Im Yeo-jin (임여진), is a South Korean singer under BlockBerryCreative. She is the lead rapper, lead dancer, vocalist and maknae of the upcoming girl group Loona and an unofficial member of its first sub-unit Loona 1/3, as well as representing a frog and the colour orange. She was introduced as the fourth member in January 2017.
- Name: Im Yeo-jin (임여진)
- Stage name: YeoJin
- Birthdate: November 11, 2002 (age 16)
- Birthplace: Daegu, South Korea
- Languages: Korean
- Position: Lead rapper, lead dancer, vocalist and maknae
- She is the youngest and the smallest member.
- She rooms with the members of Odd Eye Circle.