Sugar Stars
Sugar Stars is an online manga/webcomic created by Ranu-sama (whom can be found on deviantART as lavender-ice). Although, it is also now available as a paperback manga on this site. The storyline of this manga is AbOUT a human girl, Blanca, whose looks are unbelievably similiar to Lan, a lost DAken. This is the reason that Asher, another DAken, accompanies her in the human world. Blanca and Asher share something that before, had only been shared between Asher and Lan. They both share their life line. If Blanca or Asher were to die, the other would also die. The same happens when they're wounded.
Planet DAk
Planet DAk has two sides, a light side, and a dark side. This has nothing to do with "good and evil", it is merely called that due to the fact that one side is always illuminated, while the other side is always in the shadows, this caused physical changes in the people living on eachside, the people from the light and dark side are always in war, desperately trying to find out which side's population is more fit to take over the whole planet.
The Curse
When Lan and Asher were born, they were given a curse that would share their life lines. It was an attempt to bring peace between the two sides, considering they couldn't kill one another, otherwise they would end their own life. Before Lan was kidnapped she told Asher that she would find a way to break the curse. Another curse was also given, that they had to wear a star pendant at all times, otherwise they would lose sight, hearing, and the ability to speak, as well as not being able to use their powers, flying, etc.
Characters
Blanca Nekoi
Blanca Nekoi is a 15 year old human who attends a medical training school. Not much is known about her past yet, but it seems like a lot of things went wrong because of her. Apparently she holds Lan within her, which is who Asher and Xender'k are looking for on Earth. Because she holds Lan within her, Blanca and Asher share the same life line. Meaning if something harmful happens to either of them, the other one will receive damage as well. This was originally an issue between Asher and Lan. Blanca has a "pet" named Koroku, has no family, and her boyfriend has been missing for 3 years.
Kuroku
Koroku is Blanca's "pet", he lives with Blanca, who is the only one that can hear him. Not much is known about him, but it's known that he gets offended very easily, and that he has a small crush on Blanca.
Lan SL [starlight]
Lan SL (Starlight) is a DAken whom appears to be 17 years old, and the younger sister of Xender'k. Lan is the leader of the Light side of Planet DAk. One day, invaders from another planet came and kidnapped Lan, along with most of the light side population. The reason is unknown, but apparently, these "kidnappers" came from Earth. Asher, the leader of the dark side of DAk, went to Earth to look for Lan. The leaders of both sides don't want to fight anymore, the problem is the people that live there. Instead of finding Lan, they found Blanca, whom Lan is inside of. How this happened is unknown so far.
Asher SD [stardark]
Asher SD (Stardark)is a DAken whom appears to be 17 years old. Asher is the leader of the Dark side of the Planet DAk. Although he tries to act tough and mean at times, he is just a lovesick, tormented guy. When Lan was kidnapped, he went after her, with the help of Xender'k. They settled in the Medical Training School where Blanca studies, hacked into the school system, and now Asher studies there too. Asher has the same schedule as Blanca and follows her everywhere. Asher protects Blanca at all times in order to protect Lan, who is within her. Blanca's physical resemblance to Lan leaves him confused sometimes. The love he feels towards Lan can sometimes be felt when he looks at Blanca, but he's set on the goal of getting Lan so he can go back to DAk to fix things between the two sides. Asher shares the same curse of Lan, the life lines and the pendant. Asher wears his piggy hat in order to cover his DAken ears, even if it doesn't work sometimes. He owns a PCU (Personal Computer Unit) named Kiriku, whom he's for as long as he can remember, and they both share a special helper/master BOND with each other.
Kiriku
Kiriku is Asher's PCU (Personal Computer Unit). As Asher's helper, she stores data and loves her "Sir Asher", as she calls him, very much. Although she's a computer, is sometimes feels like she can actually feel when she's getting hurt, or when she's happy. Kiriku's age is unknown.
Xender'k SL [starlight]
Xender'k SL is a DAken whom appears to be 28 years of age, the older brother of Lan. Xender'k is also known as "Pillow" to his close friends. He took care of Lan and Asher when they was little during when the peace attempts were made. Xender'k is mostly an inventor, but he loves medicine too. When he and Asher hacked into the medical school, he became the New Doctor, and a part time substitute teacher. Most people think he is quiet and strict, but once you get to know him better, and he gets comfortable around you, he can be a real goof ball. Xender'k teamed up with Lio, to research on Blanca and Lan's status, hoping to find a way to separate them and get some answers. Xender'k loves needles, attacking people with needles that is. He also loves adorable things, and he seems to be falling in love with Lio. Xender'k doesn't get along with his PCU, Adrian. The female students at the Medical School love to harass him, they seem to have a crush on him.
Adrian
Adrian is Xender'k's helper and data storage (his PCU). Not much is known about Adrian, but it's known from how he acts that he doesn't "sugar-coat" anything.
Lio Tsuki (Moon)
Lio Tsuki, whom prefers the last name Moon (his dad was Japanese, but he prefers the last name "Moon", Lio doesn't like Japanese much.), is a 16 year old human with some kind of anger issue. He explodes at anyone who tries to argue with him. His mood changes radically, and his eyes change with his emotions. Lio is supposed to be dead, due to a deadly disease he has, which killed the rest of his family, but his brother was assassinated. One day, he bumped into Cleo, a cat possessed by a pure spirit, and she granted him more time to live, in exchange for love. Cleo gave Lio the present that consists of "cat ears" and a "cat tail", giving him the ability to both hear and run like a cat. Although, no one notices them, as if he had always had them. Lio pretends to love Cleo and goes on with his life. He has met Blanca at the orphanade and they both study at the Medical Training School, he knew about Lan all along. Lio has a weird sixth sense that lets him feel auroras. So when he found out that Asher and Xender'k came to Earth looking for Lan, he offered to help Xender'k in his research. Lio blushes a lot and thinks he is falling in love with Xender'k.
Cleo
Cleo is a pure spirit possessing a white cat, whom exchanges her powers for love. Her current victim is Lio. Cleo's age is unknown.
Izuki
Izuki is a 17 year old human, he has very long hair and is deadly. He is only polite and nice around Xian, certain other assassins, and his boss. Izuki is an assassin, currently he is targeting Blanca for unknown reasons, it is also unknown why he hadn't attacked yet. Izuki was in a plane accident 3 years ago, and lost his memory. He was taken in by his current boss, and was turned into an assassin. He is among the top assassins now, and in charge of training a new assassin, Xian. Izuki learned to care for Xian like a little brother, and he plans on ditching the assassin life when he turns 18, taking Xian with him to start a new life.
Xian Prill
Xian Prill is 12 years old, even though he was made in a laboratory, he's still a human. Most assassins that work at the base are laboratory made. Xian is an assassin in training. He is very shy and weak, but sometimes tries to act tough for Izuki, who is soon going to be his older brother.
"The Boss"
[Human]
The Boss' real name and age is unknown, so he referred to as "The Boss". He's the boss of an organization of assassins. He's behind Izuki's current mission to assassinate Blanca. Not much is known about him.
Kim
Kim is 15, the Boss' daughter. She's human and is currently flirting with Izuki.
Riki
Riki is 26 years old, human, and an assassin working for "The Boss". He runs around and plants bombs on people. He has another job outside of assassin business that allows him to get close to the one person that will make him go head-over-heels in love as soon as he gets to know him better.
References
Sugar Stars Manga In the "characters" section along the left side is where I got most of the information.