Kim Sunghyun (leader, main dancer) :

has a sch violence scandal (resolved to be false)

the fandom (sunset) calls him light because of his righteousness. Whenever they see him in a video they are like “huh KSH? Where? I only see light” hahahaha

he is very good as household chores coz he is the eldest of 4 siblings and will later be known to the public as the son in law every mothers want. He is also a fan of a top idol that our MC blackmailed who somehow ended up becoming friends with the MC and sometimes help the group out. He is also that physically hot member... ”he will later show abs”

Sung Jiwon (main vocalist) :

he has a pure appearance and has been a traineee for 7 years. He is most of the time gentle but he is also the most domineering n scary when the situation calls for it. MC ranks him as the best looking too. Oh he is also called the practice machine coz he drags everyone into a hellish level of practice hours. He is nicknamed Angel by the fans.
he was in a scandal where he was originally supposed to be the Center of a boy group of a big company but he was taken out of the debut group without any proper explaination. Then that same comoany tried to hook him up with a sponsor (dirty b**tards) which he escaped thanks to our MC in the past (when he was PD). Jiwon can’t remember it tho coz PD MC is erased by the system but the members still rmb what PD MC a did for them, they just can’t rmb who exactly it is. Anw after escaping, he returned to that company, turned off the cctv, took the CEO’s gold cubs and destroyed the practice rooms’ mirrors and then quit the company, so yes, he’s actually a hardcore character.

Seo Hoyun (sub vocalist, our dearest MC) :

cunning, smart, crazy protective of the members. He doesn’t care if his methods are dirty. He blackmailed a paparazzi into exposing celebrities that look down or hurt the members. Oh and one time in idol olympics, the youngest got hurt during the relay race and MC was angry with the youngest for nit caring abt his injury and stubbornly continued running so their group can take first place. He also got pissed off by the medical staff who didn’t treat the youngest so the MC carried the youngest on his back and ran to the hospital. Their group was poised to win 1st place but couldn’t attend the ceremony coz of the injury so the youngest was worried n didn’t wanna go to the hospital but MC said “don’t worry abt anything, Hyung will take care of everything so let’s go”. Omg they r Soo precious I tell u. There’s too much depth to this MC so I’ll stop here, read the book hahah.

kang Yi Chae (rapper, composer) :

this is the most mysterious character in the whole book. Till now we barely know much abt his background but he is also the most talented and clever in the group. He reads the MC so well even tho our MC is quite the sCammer. Basically he is increadibky clever. He is also shameless. He enters the room like “the loveliest Yi Chae is here ~” and when they film their own reality show he tells them to add captions on his scenes like “wow the cute and handsome Kan yiChae has appeared (Kang yichae told us to add this) ”. He makes almost all of they’re groups songs and he is so crazy talented many ppl also sends him lovecalls asking him to compass songs for them which he 100% rejects. He is also very very sensitive to health if the members, mainly the MC. The MC once fell I’ll, coughing blood n sht n KYC witnessed it. It was the first n only time KYC lost all expression on his face coz he was so angry. Anw he is the member that always see the MC moments when he is sick. No one rly knows why but he is very loyal to the group as if that’s the only thing he has. Oh he also has a soft spot for the youngest. According the KSH and SJW, he was unfriendly as a trainee until he met the youngest. He also once told the MC in a srs conversation that among all of them, the youngest might be the most mature.

Dae Jun (lead dancer, our precious maknae) :

scandal-double contract coz his prev company scammed him. (Ofcoz will be resolved by MC)

he is the purest and sweetest thing ever. He is like that emotional support pet of the group. The hyungs like to tease him and the MC always pulls his cheeks and pats his hair. He has a weird sense of cooking (strawberry spaghetti, etc) that he is very passionate about. And his Hyungs all try their best to avoid his cooking n eventually made that the penalty for their games. Haha. He is also sometimes called elephant coz he eats a lot. At like ch 300 ish he enters a growth spurt. He grew up with love and follows his Hyungs well. He’s just very cute but at he got tainted by our MC. So whenever he meets ppl who insult him or their group, he can reply in a pure but sarcastic way, shutting up the haters~

In Debut or Die, Moondae will re-time traveled to the past as part of his main mission and was forced to start over as a trainee, but there's a catch. He will have to become an idol with his own face, not Moondae's face. At first, I thought that was cool! "Oh!! He can actually debut as his original self?! So why the heck did the system transmigrated his soul into Moondae's body? There's going to be a plot twist here, right?!" So I was hella curious and was super hyped at where's this novel is gonna go now. But then Moondae re-time traveled for the second time. Then the third time. And... it was repetitive. Because even though the setting and the trainee idol's missions are different, at the end of the day, he will become an Idol. When the fourth re-time travel happened, I was already bored

This novel is not like that. Seo Hoyun will re-time traveled as well. BUT! In the second time travel, he is back in his previous job, as a director. And the third time travel, he become an actor. I like this better than Debut or Die because Seo Hoyun's end goal is different each time he went back in time. And that's enough not to make it repetitive

• • Seo Hoyun: Subvocal of the group 'The Dawn' and our MC. Previously 33 now 23 y/o. He lost his parents at 20 in a car accident (he was with them, and got traumatised) and raised his younger brother (10 y/o) ever since. He is cunning, shameless, admits being a tr*sh, yet very caring of the people he's close to. He loses his mind when his brother's safety is involved. Nickname: stiffy (because his dancing was awkward at first).

• • Kim Sunghyun (23) : Leader and main dancer. He is righteous, responsible and takes care of the group. The members tease him a lot. A big fan of Ju Woosung and the oldest of 3 siblings. Nickname: teary-eyed, light.

• • Sung Jiwon (23) : Main vocal. Normally kind, so he might be perceived as being weak, but he's actually strong. Likes training, and pulls everyone in with him. He was raised by his grandmother and used to be a trainee in a different agency for 7 years. This poses some problems for him later. Nickname: Training machine, broken rap machine.

• • Kang Yichae (21) : Rapper. My favourite after Hoyun. He is mischievous and funny. Just as shameless as Hoyun. Him and Hoyun are the only ones who don't cry in an emotional situation. He always teases the other members. A genius composer. He helped Hoyun the most as he has seen him in his worst conditions. His wish is for the members to be healthy and happy and work together for a long time.
    Nickname: gangster.

• • Jung Dajun (19) : Subdancer and youngest in the group. He is a clump of energy. The MC calls him bang-bang (the sound of jumping) because he's always running around. Bad at studying. A big drama enthusiast (claims he had been watching dramas in his mother's womb). Likes actor Min Jiheon of the same agency. Makes some weird mixtures of food. Nickname: elephant.

• • Ju Woosung: Main dancer of the most famous boy group. Gets dragged around in mc's schemes. Becomes close to MC later. MC thinks he's a pushover. Quarrels with MC all the time.

• • Min Jiheon: Top tier actor. He eats A LOT. Absent minded. Has some supernatural ability. Takes an interest in the unique condition of MC and helps him later.

• • blue tiger (Lim Hyunsoo) : a famous composer. She's famous as a judge too. Takes Yichae in as a student.

• • kim Heeyoung: A producer of a survival show where The Dawn appears. A previous acquaintance of Hoyun.

• • Seo Hojin (23) : Hoyun's brother. He resembles him a lot, but less tr*shy. He's the only one who remembers Hoyun as a PD, so he serves as a proof of Hoyun's previous life. They became the same age physically in the new timeline, but Hoyun was born in January and Hojin in December.
    
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I like how I was confused about his motivation for going back to the real world until he casually mentions that he’s worried about his brother - that tracks with everything about him and it makes sense that he’d unthinkingly prioritize his brother without having to articulate it to himself even though they like. Almost never talk because of his emotional avoidance.this is a spoiler for the most recent chapter but - I don’t think this will happen but I kind of hope that the rapper somehow sabotages him from winning the award bc he knows too much but doesn’t expect our MC to completely break down emotionally and possibly physically bc he’s having fun but he’s still on the edge, big picture wise