Sujin is born in Tokyo City at Japan. She was a very cheerful kid who loved to watch animes and read mangas or books. Her family is only in middle-class but they are a very happy family. She's the only daughter of her parents so she was a little sad that she had no older brother or sister who would take care of her or play with her. Her father is full Korean and her mother is pure Japanese. Her family owns a Sweets shop in both Tokyo and Seoul. Her grandparents from her mother's side are running the one in Tokyo while the one in Seoul is her parents' business so Koreans can also try delicious Japanese sweets. Aside from Japanese sweets, they also sell chocolates, candies, cookies, cupcakes, cakes and also macaron which is Sujin's most favorite. Sujin enjoyed helping her mother make the delectable sweets. Her father is a businessman and he was the one who started this shop. Shikshin Sujin gets hungry most of the time when she's in the shop so her mother taught her how to make them as she grows. Her family goes on vacation to Japan on special ocassions to visit the relatives on her mother's side. 

Sujin would steal some sweets secretly  when she was young and used to watch her Mom make the sweets. Their shop was liked by many people whether they are from their neighborhood or different places. Sujin started to like singing and dancing when she accidentally changed the channel to "Music Bank". She likes many idols nowadays but she idolizes DEUX, VIXX, A-Pink, 2NE1 &  Big bang. Her Mom once heard her singing VIXX's "Love Letter" in her room and adviced her to audition. She secretly cried before the day she was going to start training in the Jellyfish Entertainment. She will truly miss her parents and that is why she teared up before going but this is what she loves to do besides making sweets... Sujin has so much passion for performing. She would be emotional when singing ballad songs and really full of energy and charisma when dancing or rapping. Sujin had to leave her precious town. Their neighborhood's people are really kind and pleasant so she will miss them a lot.

Sujin can be described as a beautiful blooming flower. She has a cheerful personality that can make anyone happy and always has a smile on her face. She's really a nice girl and she is kind-hearted. She might be seen as girly in their neighboorhood, they were shocked when they saw her dance VIXX's "Voodoo Doll" not in a girly way but how the VIXX members dance it exactly. She's actually also a cool girl who can amaze everyone with her dance skills. She's such a very naturally cute and sweet girl. She is helpful and considerate to the people she loves and even those who she doesn't even know. Of course, everybody is not perfect... She has many flaws like everyone else. Sujin is totally a blunt and straightforward girl. She would tell you what she thinks immediately. She is not a very see-through type of person. She tends to hide everything inside until she explodes because she doesn't want people to worry about her and she wants to act like a very courageous and tough girl. Sujin is sensitive so she shows a strong girl outside when actually she feels like she wants to burst out and cry it all out when she gets into arguments with some people. STUBBORN. Really Stubborn. When she says she doesn't want to then you'll never ever change her mind UNLESS! Unless you give her a caramel or lemon candy! That is the secret weapon of her Mother when she keeps on crying non-stop when she was young. Until now that she has grown, she still loved it so if her friends wanted to make her do something with them then it is definitely the trick! 

Anyone would be fooled by Sujin's amazing acting skills that she uses even in everyday life. Like when she was 15, she was bumped by an ahjussi accidentally. Sujin acted out a fall and pretended to be really hurt or injured. What happened? The ahjussi was deceived by her acting skills. He gave Sujin some money for her injury and he had to send her home. Sujin is a hyperactive girl and she is 4D as well. She would do those weird gestures or actions everyday. Sujin is short-tempered since she is sensitive so she gets angry really quickly. She gets into arguments mostly in school because of those bullies who are bullying those poor innocent ones and she hates them with a burning passion. They are like equal to bad people as well. If one of her schoolmates gossips something bad about her or tells rumors about her then that someone would receive a warning death glare from Sujin. As she hates those types of people, she wouldn't make herself one of them and tell them what is right and wrong. Sujin likes VIXX a lot but she's not a fangirl. Instead of a fangirl, she idolizes and learns a lot from them. 

HOW TO ACT AROUND YOUR PARTNER. Sujin would poke his cheeks when she's playing around with him. She would feel really shy and hide her face cutely when she's blushing. She would point things here and there when they are on a date. Sujin would want to take selcas with him and the beautiful scenery in Jeju Island. At the first meeting, Sujin will be nervous but she will smile a lot since it is her habit to always beam a bright smile at people. Sujin will eat properly in front of the guy and she will even feed him shyly. Sujin would make some sweets for him and all of them at the place where the romanticists are staying. Sujin would be just natural about initiating skinship with him since she is so innocent. Sujin can be stubborn but in a playful way with a guy. She would always check herself and become really concious around the guy.