Aila is a brave girl, she doesn’t shy with everyone around her and an easy going girl. She's one of a model student in the school. She’s mature outside but not inside. She’s the only child of her family, that’s why she behaves like a child eventhough she’s not the maknae of the group. She’s so innocent and cheerful  but sometimes she can be serious if it related with her dream become an idol and school. Her parents and her teachers wants her to be a medical school student but she keep on chasing her dream as a singer.

Aila is an easy-going girl. She can get closer to anyone easily and she can adapt well with the members.  She’s a cheerful and enthusiastic girl. That’s why she can pep up everyone around her.  She likes to explore something new and try to learn about it. Sometimes it’s disturbing because  she won’t stop asking people if they didn’t give her clear answer for her curiosity. She never let herself stand idle and she’ll find anything to do. She looks mature outside but not inside. For a new people who just met her, she’ll talk and behave politely like an older woman. But after you get closer with her, she will act like a child and you’ll got more interested with her. She likes to teasing other members to catch their attention. She loves to get more attention because she doesn't get enough attention since her parents are busy enough with their bussiness. She wakes the members up by teasing themself until they wake up. And after that, she leave them and go for snack-hunting. She loves to eat, she doesn’t like to skipped her meal even if she has busy schedule.

She’s capable on doing her works perfectly, mmm... she’s a perfectionist I think. Especially for her performance. She won’t let herself for missing something that makes her looks good while on the stage. After she done with her prepare, she’ll change into the iest member (maybe?). You won’t find her cuteness except for her hotness. She’s addicting for performing after her debut stage and she loves to be the spotlight. 
There’re funnies fact about her. She can’t understand people who talk in satoori with her. She has been living in Korea for a long time but it’s hard for her to understand about it. She can’t control herself for laughing so hard if it comes for a joke. She loves soccer, she will spend her time to watch football game on TV and become over-reacted when she watch it. She will hit a table or everyone around her everytime she’s become over-reacted for soccer.

Aila is close with Beast’s Doojoon because he’s her neighbour and her playmate when she was young. Actually, Doojoon is her first love, but they didn’t notice it and he think of her as his younger sister.  She was a trainee of Woollim Ent. and supposed to debut as Woollim Girls, but she resigned from Woollim Ent. because some of Infinite’s fans (Inspirit) noticed that she’s close with Sungyeol of Infinite and thought that she’s dating with him. So, she decided to quit and join her latest agency because she doesn’t want to ruin her dream and Infinite’s career.

Her fandom called Uptown Girls and Uptown Boys because she comes from a good and affluent family and she behaves so innocent, cheerful, and childish like an uptown girls from aristocratic family. But on stage, you won't see her "uptown girl side" but only her iness that will make the stage become hotter.

                                                                                                    » Style    

Aila loves blazer very much. She thinks a blazer and jeans is a perfect match ever for her. She almost wear it everyday except for practice or at home. She doesn’t care about her fashion (eventough she has a  good body line), she just wear something comfortable. She has a wardrobe room in her home. You'll find all design of clothes but, mostly you'll see blazer there XD

this is what she wears at home and her style when she's hangout.

She was born in June 4, 1994 in Australia. Her father (Yoon Yoonjae) is a diplomat and her mother (Moon Heesun) is an online bussiness-woman. She moved from one country to another country. She was born in Australia and lived there until she was 5 y.o, then her family moved to Korea. When she 9 was y.o she moved again to Washington D.C. then when she was 15 their family back to Korea and she started to fell for Idol’s life after she met her old friend Yoon Doojoon who had been became Beast’s member.

She’s the only child in her family, actually she had a younger sister named Yoon Hara but she was died because of car incident when they’re young. When she lived abroad she started to practice singing, piano, viola, flute, and joined her school classic orchestra in Washington. But after she knows Kpop, she started to like Kpop and Hiphop.

Doojoon is someone who can easily catch women's heart. One of that women is Yoon Ara, however they didn't realise it for a long time. Because Ara is the only child in her family, she wished to have an older sibling and Doojoon capable to be her older brother. He takes care Ara well like his biological sister. Doojoon is a humorous man who can make Ara losing her control and laughing until she began to cry. Sometimes they argue because of a little things but they help each other a lot (mostly Doojoon helps Ara to solve her problem). They both love to eat, they often go out together just to try for some famous restaurants. Beside that, Doojoon likes the way Ara's eating. Doojoon's funny and shameless side are Ara's favorite things of him.

But, she agreed that Doojoon looks scary when he puts on his serious face esp. when it's all about Beast. He's a perfectionist on stage and never believe in failure, he would try his best. He looks manly outside but actually he's the worst drinker in the group. He has a nice side and warm-hearted toward everyone around him. 

She didn’t notice if she likes Doojoon at first. She tought it only “a feeling for a brother”. She even dated with Beast maknae after Doojoon introduced her with him but it only last for 2 years and they broke up when Junhara scandal was out (she was afraid if she could ruined his career). And after that there’s internal scandal (only some fans who knows about it) about her friendship about Sungyeol, her senior in Woollim Ent., and fans took it misunderstanding that they both dated. At that time, Doojoon become her sharing partner and he helped her about her resigned from Woollim. At that time she realised about her feeling toward Doojoon isn’t only "a feeling for a brother".

And before her debut, Doojoon confeesed that he likes her.

“ Ara-ya, I should tell you something,”

“ Mwohae?”

“ I like you.”

Ara become statue after she heard about his confess.

“ Oppa, you know I shouldn’t dating right?”

“ I know it. I just wanna tell you about that. I will always be your oppa, your friends, or whatever you need except for boyfriend. But someday, if you think the time is right, can we date? I’ll be waiting for you,”

“ Keure...”

“ So, don’t let your heart fo anyone okay?” Doojoon giggles as he said that.

“ I’m taken by but it’s unofficial,” Ara just laugh and she felt her cheeks are blushing.