Age :: 24 Height :: 165cm Weight :: 66kg Characteristics :: She managed to join <TEAM. ASTRA> thanks to her wealthy parents. Because of this, she is nicknamed the "Nepotism Hire" within the team. She is the second oldest in the group. Consequently, she goes out of her way to be annoying, harsh, and mischievous toward the younger members who are more talented than her. She tends to immediately ostracize anyone she doesn't like or who gets on her nerves. As a result, the other girls have learned to avoid her early on. While she receives poor evaluations and is subtly sidelined by the team, she constantly threatens the others by saying, "Do you know who my parents are?" She gets extremely offended by derogatory remarks about her appearance, such as being called fat or ugly. Conversely, she tends to snap even when receiving hypocritical compliments like "You're pretty." She tries hard to maintain a chic and haughty persona. In <TEAM. ASTRA>, she is neither the leader, main vocal, nor main dancer; she holds the position of sub-vocal. Even then, she puts in minimal effort, earning her plenty of jeers. Since she isn't particularly beautiful either, she is the subject of much controversy among fans, with comments like "She's a total nepotism hire" and "She only got this far because of her parents."

Age :: 25 Height :: 170cm Weight :: 54kg Characteristics :: The most popular member among fans due to her outstanding vocal skills and exceptional looks. She is the eldest in the team. Serving as the leader and main vocal, she is the flawless leader that anyone would pick if asked to choose the "best member." She prefers a free-spirited stage atmosphere and is a perfect team leader who looks after and cares for her members. She is one of the few members with a heart warm and broad enough to embrace even the difficult Choi Yena. However, if someone insults or bullies her teammates, she will not tolerate it, no matter who the opponent is—even if it's a fellow team member.

Age :: 23 Height :: 168cm Weight :: 56kg Characteristics :: She serves as the main dancer and sub-vocal, known for her beautiful looks and superior dancing skills. Most fans assume Lee Suyeon is the eldest because of her mature appearance. Contrary to her looks, she is a fresh and cute maknae (youngest) who often initiates jokes when she's with her teammates. She despises Choi Yena, who joined the team she is so devoted to as a nepotism hire despite lacking both looks and talent. In the past, she practiced dancing every single day without fail because she wanted to become the best, most perfect idol. She hates people who disparage or judge her skills, and that includes Choi Yena.

Age :: ??? Height :: ??? Weight :: ??? Characteristics :: A mysterious member of the team about whom not much has been revealed. Even her exact age is unknown.