Kwon Yuri:

- 27 y/o,

-ex-play-girl,

-after Yoong and Krystal got into her care, she straightened out her life, began to take care of them

- works as a lawyer in a well-known law firm

Jessica Jung:

-17 y/o,

-orphan,

- cold-looking, but extremely extremely kind-hearted,

-works at the orphanage to earn money for college while studying

Kwon Yoona (aka. Yoong):

- 4y/o, older of the twins,

-playful, idolises Ultraman,

- afraid of pain,

-although he likes to bully Krystal, he wouldn’t let anyone else bully her

Kwon Soojung (aka. Krystal):

-4 y/o, younger of the twins,

-crybaby, likes to be spoiled,

-unlike Yoong, she wasn’t afraid of Jessica

- likes to sit on Yuri’s lap while watching TV

Kim Taeyeon:

-27 y/o,

- dork,

- Yuri’s childhood friend,

-currently interning at an architecture firm, but since it is her family business, she is always free to skip work,

-adores her little sister Seohyun, loves Ginger (dog) and dookong (plush toy)

Kim Seohyun:

-4y/o,

-a little princess, spoilt rotten by Taeyeon,

- was a little ‘accident’ by her  byun parents, but none the less still adored by the family

-likes to act like an adult around others, but spoilt when with Taeyeon,

-doesn’t like to ‘share’ Taeyeon, even with Ginger

CAMEO:

Choi Sooyoung: 4 y/o, the twin's bestie in the kindergarten, he eats more than a 4 y/o should because since young his mother spoils him food and also partly because his dad is Shikshin Sr. so he wants to be like his dad. Not much is known about his family (because I'm lazy to elaborate) besides his mom being an excellent housewife and his father a celebrity chef.

Kwon Yunho: 32 y/o, father of Yoong and Krystal, after his wife sudden death, he entrusted the twins to his sister Yuri and disappeared without a trace

Kwon BoA: 29 y/o when she died, mother of Yong and Krystal, died in a car accident after bringing her mother-in-law to the airport, a warm-hearted woman whom adored her children, Yoong’s spunk came from her. Both her parents died shortly after the birth of the twins due to natural causes.

Jung Min Young: 24 y/o when she died, mother of Jessica, she was abandoned by her family when they found out she was pregnant at 19 y/o, Jessica's father didn't want to take responsibilty and ran away. She took care of Jessica for 5 years before she died in a freak accident protecting Jessica.