The group's name, "01 Line", is a short term for the year "2001". It's a reference to the year where all the members were born, 2001.
|Name||Birth Date||Position||Final Rank||Label||Color|
|Kim Min Ju||February 5th, 2001||Lead Rapper, Vocalist, Visual||11||Urban Works||White|
|Yabuki Nako||June 18th, 2001||Vocalist||6||HKT48||Sky Blue|
|Honda Hitomi||October 6th, 2001||Lead Dancer, Vocalist, Rapper, Leader||9||AKB48||Peach|
|Jo Yu Ri||October 22nd, 2001||Main Vocalist, Maknae||3||Stone Music Entertainment||Orange|
- Minju is the oldest.
- Yuri is the maknae.
- Hitomi is the leader. 
- Nako is the outsider. In Fantastic IZ, she has no idea about this team even have a leader.