Choi Soobin. He is the leader of txt. He was born on December 5, 2000, he's part of the hyungline so he is the second oldest member. He is the second member introduced by txt during pre-debut. He is the tallest known idol/trainee under BigHit, but now that Cortis has just debuted, he has a new rival who is taller than him. He also has a twin who is not related to blood, namely Minhyuk from BTOB. Soobin has dimples which are one of his charisma. One of his unique abilities is that the skin on his neck and cheeks is very stretchy. He can cook sweet foods like desserts, but when he cooks salty food, it definitely tastes... yes, that's how it is and Yeonjun is always the first person who dares to taste Soobin's food even though his face is forced. He never makes any spelling mistakes (sarcastically). Recently he went live on Weverse for 5 hours, the content of which was that he only listened to around 150 Kpop songs from the first to the fifth generation and this is what made Soobin loved by other fandoms until now he has the nickname "Kpop Professor" and his favorite Kpop group is KARA. His representative animal is a rabbit 🐰and his MBTI is ISTP

 Choi Yeonjun. He was born on September 13, 1999 he is also part of hyungline and the oldest member in txt. he also has an English name, Daniel Choi, he was the first member to be introduced during txt predebut he has been a trainee for 5 years so he is sometimes known as "The Legend Trainee". Yeonjun has a good fashion sense He likes the best and unique clothes. when he was little he wanted to be a cartoon animator. he has hobbies Dancing, skating, eating. Yeonjun’s friends call him ‘Yeonjun-ah”. even though they are younger than him because of that they often fight (for fun) because of that especially with beomgyu. He was an MC on Inkigayo from April 2022 to April 2024 he also said that he is inkigayo’s favorite. he is one of two members who has released a solo song besides on the Star Chapter: Together album namely “GGUM” on September 19, 2024. Soobin and Beomgyu think that Yeonjun is the cutest because of that he is often called “the fake maknae”. Yeonjun is an only child, when he was little he really wanted to have a younger sibling and now he has 4 but he forgot his conscience request (hehe) his animal representative is a fox 🦊 and his MBTI is ENFP, he is the most extroverted extrovert in the hybe building almost all the staff and other groups he knows their name even he gives a special nickname or affection.

 Choi Beomgyu. He is born on March 13, 2001, didn't want to join the hyung line because he didn't want to be considered old, and didn't want to join the maknae line because he wanted to be respected by their maknae, so he created his own line, the Beomgyu line. He was the last member to be introduced during pre-debut. Back when he was in school, he had been school president, class president, class vice president, hall monitor, and school vice president. He has been a trainee for BigHit for 3 years. According to one of Beomgyu's friends, Beomgyu is energetic to the point that the whole school tried to be his friend. He's also very charming. Beomgyu hates tomatoes or vegetables. And Beomgyu is the noisiest introvert. His MBTI is INFP, but in reality, he can't keep quiet at all. In fact, his school friends said that if Beomgyu was absent, their class would be very quiet. So, he is the mood maker of the group. Beomgyu's charming point is his profile and his sharp jawline. Beomgyu is the member who most often invites his members to aegyo at their concerts. He also has good drawing skills. Beomgyu is also one of the members besides Yeonjun who has released a single other than the Star Chapter Together album, namely the mixtape Panic, on March 27, 2025. His representative animal is a bear 🐻

 Kang Taehyun. He was born on February 5, 2002, he is part of the maknae line. He is the 4th member introduced during pre-debut. He has been a trainee for 3 years. Many MOAs think he is cute but he doesn't want to be seen as cute and he said he is as cold as Antarctica. Since childhood, Taehyun has been a child artist who often appears in toy models or advertisements. Taehyun is also multi-talented even since childhood he has learned boxing even though he is the shortest member but he is the member who exercises the most. He studies magic tricks and is really good at them. Taehyun's eyes are very round and he rarely blinks even Taehyun sleeps with his eyes open and they don't close all the way. Soobin even said that when Taehyun goes to sleep you have to check to see if he's really sleeping once in a while. Taehyun is a left-handed person. He has a pet cat named Hobak and an albino snake named Aengdu. His animal representative is a squirrel 🐿️ and the MBTI is ESTP.

Hueningkai. His real name is Kai Kamal Huening, he was born on August 14, 2002. he is the 3rd person introduced during the pre-debut. He was born and lived in Hawaii, USA for a month, stopped by S. Korea to meet his family, then moved to China and lived there for around 7 years. He moved to S. Korea in winter when he was 8. Hueningkai is known to be able to play many instruments since childhood such as drums bass guitar piano flute. Hueningkai is also a big fan of anime. Among all the other txt members hueningkai is the bravest member and not easily scared but he is also the laziest member to think logically. hueningkai has one younger sister named Huening Bahiyyih from the group Kep1er and an older sister Lea Navvab Huening from the group I.MET.U. He can speak Korean, English and a bit of Mandarin. He also has a unique pet in the form of a rock named Huening Lionel Mbappe. his animal representative is a penguin 🐧. His MBTI is ISTP.