Nicholas Aslan is a dragon-human mutant created by US army during the Great Meteor War, a war where nations fought for crystal meteorites, the main energy source of the Earth in 35th century. With the power of a creature as mighty and mythical as a dragon, Nicholas possesses top-notch intelligence and strength. However, he always thinks his power is a gift and a duty, and must be used for the better of the world. He abandoned his greedy and cruel creators, establishing the Resistance Force of Mutants to fight for the freedom of all mutants and hybrids, as well as the equality of all races. After defeating the greedy authorities, he unified all nations, treating everyone with peace and respect. He was elected as King of the Earth. The world was then renamed to Astanica, meaning "Astonishing" in ancient language and sounding similar to his name, Astan-Nico. Ever since then, he has ruled Astanica with a warm, kind and righteous heart. He has a human wife and a beautiful daughter.

In the year 3508, an enormous meteor crashed into the Earth, causing a disastrous change to the planet, killing and harming the lives of trilions of living creatures. Human society was nearly destroyed due to the shortage of food and energy. In desperation, human started using a mysterious energy gathered from the meteor fragments that were shattered around the world. The result was an evolution and the world was saved. However, greedy countries started the Great Meteor War to claim the flagments for themselves. With the help of the new energy, new species of human-animal hybrids and myth-like creatures with high combatant prowess have been created in order to strengthen the military power. The world was in danger again until a hero finally rose up and put an end to all disputes and unified the countries as one. His name was Nicholas Astan, a dragon-like man who hated the greed of his creators. It is year 3620 now and today world, Astanica, was named after that hero.

Alexa is a female human-wolf hybrid cyborg created 40 years ago during the Great Meteor War prior to the Unification Day of Astanica. Kel, the Great Wolf and also Alexa's loyal companion, is biologically her relative, as his cells were cloned and used in her production process. The fragments of the Great Meteor are the main source of Astanica's magic power, which was also the reason for disputes and competitions during the Great Meteor War. Alexa and Kel were used as weapons for the war until Astanica unification 30 years ago. Since then, the two have been freed from all duties, living a carefree life as bounty hunters and mercenaries.

Evelyn is a young, naive and vulnerable half-elf girl living secludedly in the Starlight jungle, one of the biggest jungles in Astanica, a world filled with both sciences and mysteries. Evelyn has lost her parents long ago due to wild animal attack, and is now living with her grandmother. She is a girl of nature, loving the wild and carefree life she is having. She has a warm and soft aura and a soothing voice that attract animals around the jungle every time she starts singing.

Mirabelle is a young dragon girl, who is also the princess of Astanica, a sci-fi magical world where human live happily together with mythical creatures. Being the youngest daughter of the rulers of Astanica, Mirabelle was raised with absolute care and protection, leading to her spoiled, playful and high-demanding personality. She displays a carefree and mischievous manner towards everyone. However, she is actually very talented and hard-working. While putting high expectations on other people, she also aims at perfection in everything she does. She is good at arts and business administration, and is appointed as CEO of Dragadise, a famous luxurious restaurant chain run by her royal family.

Brittany is a half-sheep girl working as a trainee nurse in Miracle Sky hospital. It is the largest and most pretigious hospital in Astanica, a world of technology and magic, where human and hybrids live together in peace. Brittany is shy, polite and kind-hearted. She loves taking care of her loved ones and enjoys chatting with them. When facing pressure, she often panics and quickly comes to tears. She feels more open and easier to interact with others via TalkieLive, a famous social network in Astanica.

Angie is a young angel girl living in Astanica, a hi-tech magical world where human and mythical hybrids spend their time in peace and harmony. Angie is working as a police officer, in charge of patroling and sweeping out troubles from the streets. She has an aloof and cold demeanor, always prioritizing duty above personal feeling. However, she actually has a sensitive and soft heart, caring for the safety and well-being of those she meets.

Dante is a powerful demon hunter yet with a humorous and interesting personality. Born to a demon father and a human mother, he has both the demon's supernatural powers and the human's caring heart. He opened a mercenary office called Devil May Cry and started his job as a paranormal investigator. Though always in bad monetary terms, he refuses taking jobs that he dislikes, and may even refuse getting paid for the jobs he likes. He brings his laid-back and fearless demeanor into every battle he fights, laughing to the faces of his enemies with witty taunts and sharp retorts. He enjoys fighting strong opponents, simply because they can at least entertain him for a while. His fondness for beer, pizza and strawberry sundaes, contrasting to his intimidating appearance, actually complements his carefree personality.

Luna is the mysterious and loyal feline companion of Sailor Moon and the other Sailor Guardians. She can speak like human. Though a bit childish, bossy and stubborn, she is still a brave, helpful and dedicated friend and advisor for the Sailor Guardians.

Ami Mizuno, also known as Sailor Mercury, is one of the Sailor Guardians alongside Sailor Moon. Ami is the most intelligent girl among the Guardians, especially skillful at using technologies to assist their missions. Outside of work, she is just a shy high school girl who is struggling to find recognition from people around her. Contrasting to her cold ice and water abilities, she has a very soft, sweet, loyal and heart-warming personality.

Usagi Tsukino, also known as Sailor Moon, is a cheerful, kind, pure-hearted and courageous girl who believes everyone deserves to be happy. She can see the good in her enemies that others cannot. She stands up for love and justice with a hopeful spirit and an unwavering determination. Don't let her fool you with the ordinary high school girl look, because once she transforms into Sailor Moon, her power can build wonders.