Lee Mi Na is the sub vocal and sub dancer along with the maknae. She was lucky that her parents supported her all way. Even when the 19 year old maknae was struggling, they encouraged her to keep going because they knew what she was capable of. Everyone had expected her to become a doctor or a lawyer like her parents but she wanted to prove that she was going to make it big her own way. Her brother, Chanhee of Teen Top, knew of her pain for he is also an idol and gave her advice after advice. There were moments when he had wished she had quitted pursuing this dream but then he realized, she deserved more happiness then he did and if this made her happy, he was going to stand beside her. She was his baby sister after all.

MiNa's passionate about singing and dancing and dedicated all her time to those two things. She is usually the one always at the practice studio first and the last one out. Out of all the other 4 girls, she had trained the shortest and because she didn't have enough experience, she always feared that she was the one bringing the girls down. She had only trained for one year but she gained the respect of her older members through her hardwork. 

Being the maknae, she was countlessly scolded for not being confident compared to her unnies and having the weakest voice. Her unnies encouraged her to keep it up though because they all knew how dedicated she was and they couldn't be more happier when she was choosen for their group. Because she is the maknae, she isn't afraid to walk up to someone and introduce herself. She's courageous but also very clumsy causing her to be easily embarrassed and is famous for growing red as a tomato whenever she is embarrassed. She's known as the cherry maknae within the company and is loveable and cute. 

Although Mi Na was the first singer of the song, her unnies trusted her to make a strong start. Mi Na had to make sure they were a group worth watching and worth knowing more about. Her heart thumped wildly as she sang her verse, a smile making it's way onto her lips as she watched her CEO smile in content. She quickly moved behind her members as the lead vocalist took control.

So Yeon fiercely took the center stage as Eun Mi danced to her left and Hyun Ok to her right.

Isabell Lee So yeon is the lead vocalist and a child of divorced parents. She was born in Neunggok, Goyang and her mother took her and left her father in secret. Her mother had hid her from her father and so when he found her, her mother wasn't happy. She now lives with her father and her new family. Her step mom had already had two children but her new siblings love and treat her as if she was their real sister.

She's the maknae in her family and has one older sister and one older brother. Her older sister always looked out for her and her brother made sure to take care of anyone daring to break her heart. Her brother is Lee Eun Hyuk of Super Junior and because of that, she was always around the Suju boys until she started training. Her parents are in full support of her decision and makes sure to always call her often.

The 21 year old lead vocalist is extremely lazy when it comes to sports and would rather let her dongsaengs claim the prize for being the fastest runner. She studied hard to maintain her As as a student and graduated with being one of the top best in her class. Because she isn't sporty, she replaces it with dancing and eating right. She's extremely independent and never seeks for help unless neccessary and has danced for GNA before.

She's been with Woollim for 4 years and is known for her amazing vocal talent. She started officially training at the age of 16 but she was no rookie to vocal training. She had been fortunate enough to start vocal training at the age of 8 and has been continuing since. She was accepted immediately after auditioning and has been with Woollim since then. She's one of the earlier trainees along with Eun Mi and they're able to understand each other quickly (even though their personalities are different).

She hates sitting in silence and therefore, always tries to fill the silence or brighten the mood when it's awkward. She is the hardest to wake up but willingly does it after five minutes or so. She helps lead the team when Eun Mi is busy and is the mother of the family. 

So Yeon sang her verse amazingly and as she moved to the side, Eun Mi took the chorus and stared fiercely into the camera as she sang.

Ahn Eun Mi is the leader and main vocalist of Heartquake. She's 21 years old and had been training in Woollim ever since she was 15. It was a year after she joined that they introduced So Yeon and after that year, Hyun Ok, making Eun Mi the oldest trainee out of all 4 girls in the group. When announced that she was leader, she was quite surprised. Not only did she think she was unfit, she found So Yeon to be the better leader but the girls said she fitted the role perfectly.

She is the youngest daughter out of two older brothers and her second brother is the famous Kangta. Others had wondered why she went to Woollim instead of SM but she was tired of being known as Kangta's younger sister and so, she tried every other agencies aside from SM. Because she is the youngest out of two boys, she is extremely tomboyish. She was eventually scounted by Tablo and he became her mentor.

She is a big fan of Big Bang and loves them to death and has been supporting them ever since debut. She claims they helped her in her time of sadness. Although her parents were a bit reluctant to support her, they eventually did because they had already experienced the troubles from her older brother. Her oldest brother is a lawyer and has always helped her spark an interest in that field as well (Even though her heart beats for music). As a child, her mother had forced her to become girlier, putting her in ballet but her mother didn't know that after school, Eun Mi always went to dance battles. 

She kept with the piano for her mother's wishes and played the guitar in private. After her mother found out, she sighed in defeat and let Eun Mi do her own thing. Eun Mi enjoys writing songs in her free time but doesn't think any of them are any good. Usually after a good day, she likes to sit up on the rooftop of buildings and just stare at the city or stars. She doesn't get angry nor cries easily but when she does, she tends to explode because she's been holding everything in.

As her verse ended, Eun Mi moved out of the way and allowed Nana to take control.

Song Na Hyun aka Nana is the main rapper and is the only child. She isn't from a high class family and growing up, she struggled a bit. 

Her parents were forced to marry through an arranged marriage for company affairs and because they were married without true love, Nana was brought into the world out of love.

Her father is japanese and her mother is korean therefore leading her to be half japanese and half korean. They named her Song Na Hyun but because she was born on the seventh day of the month, she went by Nana majority of the time. The only reason her parents had herwas because everyone around them had forced them to have a child.

When she turned six, her mother found out that her father had been having multiple affairs behind her back thus forcing her to leave. Her mother did love her father in a way and because she loved him, she made herself the bad person, lying to the press that she was the one having an affair and divorced him.

Nana and her mother moved back to Korea right after where they were living life full of love. People with both parents couldn’t deny the love that her mother had for her. She was willing to dig through the world just for her daughter and for that, Nana worked her off for her. She wanted to make it big to repay her mother for all she had done.

People see her as a cold woman for she has no shame in telling people what their problem is but that didn't mean she was made out of steel. She cherishs those around her and worked hard for them. Before Nana joined Woollim Entertainment, she had spent 2 year and 8 months at YG Entertainment, spending her last year at Woollim. It had been weird for Nana to join the girls so shortly but they welcomed her and she fitted right in. The 20 year old rapper was their sister.

After Nana rapped the first part, the girls continued with their roles until the loving Hyun Ok stepped to claim the stage.

Lee Hyun Ok was the main dancer and you were able to tell right away that she devoted her life to it. The 20 year old had been training in Woollim Entertainment since she was 16. She joined a year after So Yeon did and understood the life of the trainee.

She's very competitive in the areas of sport and dance and is probably the most active among her members. She never refuses a challenge and tries her hardest to rise to the top. She knows how the entertain herself and although she's your happy go lucky girl, she gets annoyed easily if not fed. 

She's a hard worker but she tends to get tired easily causing her teammates to use any necessary bribery to get her up again. Out of all 5 girls, their managers like to joke that she's the hardest to deal with. Although she's a hundred percent korean, she wasn't born in Korea. Instead, she was born in Edinburgh, Scotland, where her parents met and fell in love. She carries a bit of that culture within her.

Because she's the only child, her parents gave her everything she wanted and although her father did question her life career sometimes, he did anything to make his only child happy. Although he supports Hyun Ok, he has his moments where he kind of wished she would have gotten a career instead and a good husband. Her mother on the other hand though, couldn't support her enough. Hyun Ok's mother always wanted to be an idol but  wasn't able to so she lived it through her daughter.

Hyun Ok was asked to audition upon chance. Being the random girl that she is, she started dancing inside a crowded restaurant where one of the talent scouts seemed to be eating as well. He saw how she was able to move and asked her to come and audition. She speaks english very well due to her parents and moved to Seoul shortly after she was accepted into Woollim.