Playful and a Goofball
Younghee is a playful girl, the kind of person that'll able to coax your true self out even though you're as awkward as a turtle. She loves to crack jokes and makes a fool of herself like doing weird dances or imitating animal's sound. Oh, and she's a walking pick-up line dictionary, the hilarious edition. Don't be surprised if suddenly she comes up to you and says, "Girl, are you fart? 'Cause you just blew me away." Yeah, she's the girl that'll make you feel embarassed when you two are walking on the mall because she's doing weird dances or making funny noises or laughing just a little to hard.

Kind Hearted
Oh yes, despite her flaws, Younghee is a very generous and kind girl. She helps other without thinking twice and is always the first to realize when you're in a bad mood. She tries to always be there when you need her, even when it's 2 AM in the morning and she's dead tired but you're still sobbing about the guy who rejected you, she'll try to be awake just for your sake. She's very polite towards other staffs and her seniors. She'd greet them when they walks past her and ask them how was their day and wishes them luck. And not just to the SM staffs, but also other trainees and strangers. Don't be surprised if you meet her on the street and you just have no idea who she is but she still smiles at you anyway, that's just her. Yeah, sweet, right? Her politeness however, will disappear once Younghee gets to emotional.

Hard Working
Despite her being emotional, Younghee is a very hard working person. She hates it when people doesn't notice her hard work or acknowledge her skill. She works hard because she's afraid that people will hate on her if she fails. She's afraid that she'll be stamped as "The useless and talentless one in the group." so it's normal to see her practising her dance move even when it's past 1 AM in the morning, or how she constantly playing the same song over and over again on her phone to remember the lyrics, or how she's always the last to get out of the dance practise room. It's normal, but seeing her reasons, her reasons to be hard working, it's kind of pitiful. One should work for herself, not for the pleasure of other people.

Emotional
They say girls act according to her feelings, well that quote really fits well with Younghee. She's very emotional, easily angered and easily gets sad. Once something is bugging her mind, she can never forget about it. Younghee will think about it over and over again, wallowing in self pity or wondering why it happened. Once she gets into that state, everything falls apart. Like if somebody bashes her, Younghee will only wallow in self pity and do nothing to prove that person wrong. She's not an expert multitasker, so she can't whine about her problems while handling her career perfectly at the same time. Her emotions affects her act. If she's sad, you can see it by how gloom and quiet she becomes, or how often she sighs. When she's angry, you'll see from how cruel her words is and how everything seems to be pissing her off. She does stupid things when she's emotional, like accidentally lashing out on somebody or abandoning her members or practise time when she's sad. Younghee does a lot and say a lot of stupid things when she's emotional. That being said, you can say that Younghee is pretty much an honest person who'll instantly speak up when she finds things she doesn't like.

Jealous
Yeah, she's very jealous of those who are better than her. As much as she hates it, Younghee hates to see people who are better than her, especially in things that are her forte, such as dance. She'll always try to find that person's flaw, even though she knows it's wrong and stupid, but the girl just couldn't help it.

Overly-Competitive
Competitiveness is good, but Younghee takes it to a whole new level. The girl is a perfectionist who puts 100% to her work, yes it's good. But when in groups, cases like Younghee scolds a member just because a simple vocal mistakes can easily happens. She wants everything to be perfect while sometimes, things just can't be perfect. She may be your friend and you may be her best friend, but she'll never forget the fact that you are another person she has yet to beat.

Jongdae is often seen as the troller of the group, along with Baekhyun and Chanyeol. Well, that's true because he is mischievous and loves to joke around and tease other members. On cameras, he always looked very cheerful, always laughing and teasing or joking with other members and it's as if the whole world amuses him. Jongdae is really a kind and lighthearted guy. Yes he trolls s a lot but he also cares deeply about them. He talks to all of the members and will always ready to give a helping hand each time they need it, he always knows what to do to help them ease their burden and always seems to know when some of s are tired or feeling down.

He's also a very ambitious and hardworking guy. Jongdae is very passionate about singing and he's pretty much competitive when it comes to his singing talent, but he does understand that he still has a lot of work to do to improve his singing so that's why he works hard, so that his singings can be better. He has big dreams and Jongdae will do whatever he can (and legal) to achieve it. Sometimes he may feel insecure and has a hard time in expressing his feelings to the point where people won't even realize if he's hurting inside. It's as if he always hides all his pain and wounds, rather than sharing it with people who can help him with it. He's also very kind to the point of being stupid.

Well, the two are mostly seen joking around and trolling other. If the two meet, it'll me a full joke session that'll bring tears to your eyes because it can be either very, very funny or very, very corny. The two are marked as SM's source of happiness and misery at the same time because they are both love to help others and idiotic at the same time, always popping up crazy ideas and troll other people to the pits of hell.

The two first met when Younghee was visiting Ahrang in SM building. Yes, her brother was once a trainee in SM and he was friends with Jongdae that time. The two instantly clicks and they talk about almost everything. Jongdae's talkativeness and playfulness makes it easy for her to open herself. Soon, they became good friends.

Ever since Jongdae got debuted in M, the two kind of drifted apart. It's normal, since the limited time for communication and EXO's tight schedule. Even when her brother had quit from SM, the two still manage to keep in touch with each other. However, their relationship got closer when Younghee learned that some of the fans didn't treat Jongdae well back in MAMA era. She heard stories like how Jongdae's line was always the shortest on every fansign or how a fan said that he's worthless and didn't deseve to be in EXO. Younghee quickly confronted him about this through chat and she managed to get Jongdae out of his shell. He confided that he felt insecure and sad and torned at the same time and he felt worthless, he wondered what he did wrong and he confessed that he's tired, he'd been practising a lot but nobody realized his hard work. Younghee comforted him through his hardships, reassuring him that one day people will realize his worth and one day, people will be chanting his name on the stage, dying to hear his voice. They got even more closer then, without noticing that something had shifted inside their hearts.

She'll always be the one who cracks his shell that hides all his pain and wounds. Being the good best friend she is, Younghee never stop supporting him, sending him motivating texts each time he felt insecure or good luck and funny texts before EXO's concerts or interviews or tv shows. She would remind him not to work too hard and get a good amount of rest and eat properly. Jongdae is thankful on how appreciative Younghee is towards his hard work and all of the other member's hard work, he appreciates how understanding she is towards his tight schedule and how she always supports him. In truth, Younghee really looks up on Jongdae. She thinks he's an amazing and admirable person.

Ever since EXO's Wolf comeback, the group became even more famous and schedules more hectic. That means their communication will be very, very, limited. Especially since he's an idol and she's a trainee from a different company. Sometimes they wouldn't talk for days because Younghee thinks he needs a rest but they didn't drift apart. Honestly, Younghee learned a lot from Jongdae, she learned to be strong when things doesn't go her way. She learned not to give up easily on her dreams and she learned how to be determined.

Like I've said, when the two meet, it'll me a laugh-your--off session, the two loves to bully each other or work together in making other people's life miserable. They are the idiot couple, the ones who come up with crazy ideas and random jokes and funky pick-up lines. Aside all the emotional connection they have, Jongdae also loves to tease Younghee. That, or sometimes the two will be the dork duo that goofs themselves off. Nevertheless, the two prefer their relationship to be kept secret (it's not even a relationship yet, but you know) so most of their interactions are limited by texts, chats, skype or phone calls. 

Jongdae also has his own pet-name for Younghee, well, two actually. He loves to call her Youngie, it's a more affectionate version of Younghee and he always call her that in their conversations, except in public.