Tara - Real Name: Kim Tae Rin; Power: Water; 20 years old; DOB: June 2nd. The EXO-K Princess, Tara is a polite and caring girl currently in Seoul University. After the death of her parents, she was raised by her older sister, Taeyeon, who looks just like her. She became friends with Jade in high school as she had trouble understanding and speaking Korean. They both live in a huge house and have had a normal life, until 12 hot aliens show up to them.

 Jade - Real Name: Zhen Ji Yu; Power: Flight (Angel); 20 years old; DOB: August 17th. The EXO-M Princess, Jade is Tara's Canadian-Chinese best friend and classmate in Seoul University. She had problems speaking or understanding Korean and because of that Tara described her as quiet and cold. Yet, she has a very caring and soft side on her. When the payment of the monthly rent for her apartment terminated, Tara offered her to live in her house. However when 12 handsome aliens show up, their lives turn upside down.

EXO (The Aliens/Guardians)

 Suho - Earth Name: Kim Joon Myun; Power: Water; 20-21 years old in appearance. The responsible, kind and smiley leader of EXO-K, Suho lives as one of the 'cousins' of Tara during EXO's time on Earth. He is calm, wise and cares about the safety of those who are close to him, including the members of EXO. He's in love with Tara, the princess.

 Kris - Earth Name: Wu Fan; Power: Flight (Dragon); 21-22 years old in appearance. The mysterious, silent yet handsome leader of EXO-M, Kris is emotionless and serious most of the time. However deep inside him, he's soft and kind and for some reason he feels like protecting Jade is his number one priority.

 Xiumin - Earth Name: Kim Min Seok; Power: Frost; 21-22 years old in appearance. The older 'cousin' of Tara and also the oldest of EXO-M, Xiumin is the member with a sense of humour. He likes to have fun and joke around, but he doesn't like to be described as younger than he is.

 Lu Han - Earth Name: Lu Han; Power: Telekinesis; 21-22 years old in appearance. The most gentle member of EXO-M, Lu Han is the brother type that anyone would want. He has a soft facial expression and a kind heart, which would make any girl's heart race.

 Lay - Earth Name: Zhang Yi Xing; Power: Healing; 20-21 years old in appearance. Kind, shy and quiet, Lay is observant and is more of the 'background' type. He's the medic of the group, though his power are at a limitation as he himself becomes weak because of healing people.

 Baekhyun - Earth Name: Byun Baek Hyun; Power: Light; 19-20 years old in appearance. Kind, funny and playful, Baekhyun is the member who everyone would think as a joker. However, he has his serious and silent side at times.

 Chen - Earth Name: Kim Jong Dae; Power: Lightning; 19-20 years old in appearance. He lives on Earth as Tara's younger brother. Chen is in charge of EXO-M's training and weapons. He is a good listener and is very considerate of the others.

 Chanyeol - Earth Name: Park Chan Yeol; Power: Fire; 19-20 years old in appearance. Considerate, calm, but humorous, Chanyeol doesn't want to talk much and can be quite cold sometimes. He also has a bad temper, which he must control greatly. Starts to have a crush on Eunju.

 D.O. - Earth Name: Do Kyung Soo; Power: Earth; 18-19 years old in appearance. The main fighter of EXO-K, like Chen he's in charge of training and weapons. This boy mostly feels awkward and is sensitive, and doesn't talk much. He is optimistic and kind.

 Tao - Earth Name: Huang Zi Tao; Power: Time Control; 18-19 years old in appearance. At first sight he is creepy-looking, but he's actually the cute maknae of EXO-M. He likes to play around and make others smile. His specialty is martial arts and doing aegyo.

 Kai - Earth Name: Kim Jong In; Power: Teleportation; 17-18 years old in appearance. One of Tara's 'cousins', Kai is the flirtatious member of EXO-K, something Tara and Jade don't like. Yet, he's protective and can be very cautious at times.

 Sehun - Earth Name: Oh Se Hoon; Power: Wind; 17-18 years old in appearance. The baby-faced maknae of EXO-K, Sehun is very introverted, quiet and mysterious. He fails at aegyo, but sometimes he shows his charming smile to anyone. Has an affection for Hyomi.

EXO-G (The Goddesses)

 Hyomi - Real Name: Nam Hyo Mi; Power: Weather; 17 years old; DOB: October 5th. A 3rd grade in Seoul High School and Tara's and Jade's best friend, Hyomi is the one who gave the EXO bracelets to them. Originally from EXOPlanet, she has this crazy and playful aura around her. Hyomi starts to have a crush on Sehun.

 Eunju - Real Name: Song Eun Ju; Power: Fire (Lion); 19-20 years old in appearance. A fire maiden, Eunju actually lives in El Dorado, a city in EXOPlanet. She is cold and has a bad personality, because of what her power has caused in the past. After meeting Tara, she starts to become brighter.

 Lana - Real Name: Lee Lana; Power: Gravity Manipulation; 21-22 years old in appearance. The new transferred student from America, Lana is actually from Gnatia. She's a cute girl with a honest heart, who catches the eye of Lu Han.

 Yue - Real Name: Kim Nae Chu; Power: Lightning; 17-18 years old. Tara's real cousin, who comes back from a trip to China. She may look cold in the outside because of her power, but in the inside she's kind and too overprotective.

Red Force

Others

 Lee Minhyuk - 22 years old, he's one of the girls' classmates. A good-looking boy, who has fallen in love with Tara.

 Kim Taeyeon - The look-alike Tara's older sister. She's described as a kind and very caring sister. She'll appear during the middle of the story.

 B.A.P - Six boys from planet Mato, consisting of Yongguk, Himchan, Jongup, Daehyun, Youngjae and robot Zelo. They considered themselves as EXO's enemies at first, but then they start to become friends.

Locations

 Tara's and Jade's house

 El Dorado

 The University

And many others to come...