Hay is one of the outgoing and talkative one. She's the type of person who can get along with everyone and anyone pretty quickly. She talks a lot, yet her talking never bores anyone. She's not afraid to talk to new people as she treats others well. She actually likes making friends and meeting new people a lot. People are comfortable with her because of the easy-going aura that she gave out. Hay usually has troubles on sitting still. She's too active to sit. She'll always seen to walk around and never stay quiet. Well, quiet types doesn't go well with her. Though Hay is always joking around, she's also hard-working in training and achieving whatever she wants. She preferred to follow rather than lead. But unknowingly, she nags a lot when the other members are slacking off. When she's tired of everything, she began to join them (slacking off xD) too.
 
She's impulsive, in a way that she never thinks twice when she does something. She never says no when people/her members ask her to accompany them to places, or asking her to join clubs and societies or try new things. If you suddenly ask her to go sky diving with you the night before, she'll definitely say yes. She has the carefree style, that she will do just anything even destroy her image for the group. Hay has this blunt side where she'll says what she thinks in her mind, even if it might be offensive. Hay has erted-mind despite of her babyface and innocent face. That's why she get along with the boys rather than the girls. Talk harsh words to her, her swears will pay you double. Swearing is her old habit but she might can control it, for now.
 
During on stage, Hay is not afraid of pulling different side of her. She can be y and charming without any troubles. She likes to be the center and always show her best. At interviews, she acted like herself. She joked around and talked non-stop. Same goes to variety or reality shows. She had the ability to make the audiences laugh and can converse well. During off stage, she's just the same good, bad and on stage Hay.

This girl was born on 15th November 1993 in Haeundae, Busan, South Korea. Her parents are Jung Seokmin, a 45 years old architect and Kim Hyomin, a retired underground rapper. She has two older brothers named Jung Minhyuk (24) & Jung Daehwan (23). Both of her brothers and parents always spoiled her since she's the youngest out of all.

During her childhood days, she used to wander around with her mother's permission, of course. Most of her neighbors know her since she's well known as a good child. One day, Hay accidentally saw her mother's photos as a rapper. She asked her mother why she's holding (a mic) & wearing things like that so her mother told her about her past. She even gave her watch her rapping and hence that was the first time she's involved in musics.

She began to learn about rapping privately from her mother. As a child, it's surprising to see that she's good at it. Well of course it comes from her mother. Her mother didn't really expect it but is happy to know that her daughter enjoyed singing. Hay started to listen some korean musics and her favorite is R&B. After years, she felt attracted to singing. Secretly without her mother knowing, she learned it. But unfortunately she got no talent. Feeling very frustrated, she practiced it everyday and it did improved day by day.

In 2007, she moved to Gangnam-gu, Seoul, South Korea because of her father's work. It was quite better and she adapted to it quickly. She's very popular in her school too, by looks not education to be honest. Since Hay wanted to pursue her career as an idol, she took dancing class. You know, dancing is also needed. She took the class for 1 year and enjoyed it to the fullest. At first, she had some problems on adapting it but after some hardworking days, she's able do to well. She learned some extra moves from her dance cheoreographer brother, Daehwan too. When she felt that she's ready for the idol life, she neglected her school works, well she's not interested in them and auditioned. Her friends thought she's crazy since she's still young, 16 years old. She went to countless auditions but then rejected. And the final was Pledis Ent. She rap Love Song, the song she composed herself. They were amazed of her looks, youthfulness & raw talents so they took her in. She realized she can did a lot of things too when she's training with them. So they told her to discover her talents first before debuting so she did. For 5 years she trained, and now her hard work paid off. All she cares is how the nation looks at Steel Kittens and wish they will be a success.

Trainee life : It was quite tough at first. She only sleep maximum for 4 hours each day, no joke. The trainees wasn't really that hard, they accept her but some of them envied her but just swept that thought off. For god sake, she's too pretty to be bullied. After years training with Pledis Ent, she improved and explored new talents of hers. But mostly she improved her rapping. She began to think that training was fun but sometimes is tiring & tensing too. There are always battles made by the trainees and she actively joined them, just for fun actually. A lot of trainees considered her as an "unnie" and admired her very much. She became friends with nearly everyone too, for her they are her family already. But there's also some quiet types that she can't get along, since she's the talkative & loud one. At school, she learn normally with her friends. They sometimes ask Hay how her training life and she would gladly tell them how. They, along with her family support her the fullest.

Baekhyun is just like Hay, talkative and friendly. He talks a lot and never fail to make people laugh. He has his own charm which makes girls swoon over him. He's somewhat has a erted mind too despite being a guy. But just don't mess up with him. He is quite scary when he's mad. A lot of guys admire him because of his outgoing personality. He protects his girl very carefully so when someone dare to hurt the girl he likes, he's not afraid to hurt the someone back. Most of the time, he uses aegyo when things doesn't go the way he planned and the victim will easily give in since Baekhyun is cute~ (><)

Though the short time both of these two spend, they still had time to crush on each other but they acted like there's nothing happened. Up till now, they keep in touch and he always tease Hay with the nickname "Shortie". She hates the nickname but she love how they were comfortable with each other. Her counter attack? "Mr. Byuntae". Every night, they would spent their time together at night time with chatting by kakaotalk. When Steel Kittens and EXO meet, they both will naturally stick together. Some people assumed them as a couple though they weren't. 

• Her family went to Steel Kittens' (SK for short ^^;;;) MV making set to support her. She's surprised and hugged them for a long time. She tried not to cry in front of them but when they've gone, she started to tear up. 

• The whole group is tired because of the diet & training that was given by the company so Hay thought of an idea to escape & have fun

• Since Hay doesn't know how to use the phone so the members teach her.. They even make her an Instagram account with the username @hay7jung for her to upload her selcas

• In SK, Hay's close with everyone especially with this one same age member. They mostly stick with each other

• If SK are going to Running Man, Jaesuk/Kwangsoo would be the best pair for her

• SK won the "best rookie of the year" and the company gave them a holiday to Singapore/England for 1 week

• Before the holiday, they had fun with barbeque party

• In Japan, SK was given one day off and obviously, Hay and one of the members went shopping! Hay bluffed that her Japanese is great but when she tried talking with one of Japanese SK's fan, she .

• Collaborate with BAP/BTS/BOYFRIEND/GOT7/EXO. She secretly fangirl-ing when she met her biases. She get to know and became friends with them~ (except for Baekhyun since she already know him)

• SK was invited to Idol Stars Athletics Championships and she participates in running.. She won silver medal for that.

• Singing/dancing/rap battle!!! >....<

• SK & Pledis artists interactions maybe??

• If SK are going to Weekly Idol, she showed her talents. She also was teased by Dony because she said that Baekhyun is her ideal type. She ended up doing a video message (+ promoting) for Baekhyun. She told Dony that they were already friends, which makes Dony even more

• Baekhyun and Hay met at back stage of one music shows. Maybe Inkigayo. One of the members saw this and all day. Then SK was brought on the stage where the MCs usually interview. The members purposefully placed Hay and Baekhyun together, and they were like.. really close

• Hay & Baekhyun had a date near Han River and they rode the couple bicycle. Since she haven't tried to play bicycle before (but surprisingly she can do it well), she warned Baekhyun many times not to fall. He playfully make "near-to-fall" action and Hay somehow hugged him. They went back because a lot of fans began to realize that there's both of them. The next day, an article about both of them came out

• Hay befriended with 93 liners during her time in Idol Stars Athletics Championships & at other places, such as Girl's Day Minah, IU, T-ARA Jiyeon, AOA Mina & Hyejeong, GOT7 Mark, EXO D.O & Tao, Sistar Dasom, BTOB Peniel, Shinee Taemin, F(x) Luna, B1A4 Gongchan, TEENTOP L.Joe & Chunji, Vixx Hongbin & Ravi, INFINITE Sungjong, A-Pink Bomi & Eunji & more

• Whenever there were quizes about education/maths, she'll definitely failed