Hyper Rune
Plot. Rune lives with her mad scientist grandfather, who is very smart, but has a habit of dressing her up in weird cosplay outfits. Rune was born with a sun-like crest on her wrist (known as the Crest of the Sun), and was told by her grandfather that she was the reincarnated Space Queen. Rune refuses to believe almost anything her grandfather says and tries to live a normal life, despite the fact that she works part-time as a cybernetic superhuman to ward off alien beings that have invaded the earth. Rune's childhood friends, Masaya  and Masato Ibayashi, are also cybernetic warriors who bear the Crest of the Sun, but she doesn't know this until later in volume one. It is also revealed that her other close friend, Aina Hazumi, is also a Crest-bearer. A horde of cybernetic aliens hail from Planet X to dominate the earth, and they ensure that their plans are carried out successfully. Many of them are disguised as humans in order to conceal their identities. These alien forces are under the command of Emperor Gald, the mastermind behind the domination of Earth. In the beginning of the series , Gald is "asleep"—he hasn't been awakened to his full power yet. During this time, the aliens are trying to revive him so that he can lead them to their victory. There are five certain objects needed in order to destroy the aliens' operation. These are the six Elements of the Sun. Each piece resembles one part of Sun Crest (five points and a central core). Each one must be obtained before the aliens are able to steal them. In the meantime, another trio of aliens arrive on earth from Planet X. It turns out they're actually on a  mission to protect Rune and defeat the evil horde of aliens. They disguise themselves as humans and go along with pseudonyms. Rune happens to befriend one of these aliens, but doesn't know that he is undergoing an important mission. Cybernetic Units. The Cybernetic suit and units in the series are Alpha, Beta, Gamma, PSI, Zeta, and Omega. The alpha unit appears to be used mostly by females such as Rune, whereas the beta unit appears to be used mostly by males, like Masaya and Masato. The other letters of the alphabet shown up in volume four during the final  invasion. Quark's cybernoid is an early model of Zeta-Omega. Due to Quark being a clone of Emperor Gald, Gald is also under the Zeta-Omega unit, which explains why Quark would have died after entering Gald's net. The Ishtar System. This is the virtual city that entraps, Rune, Quark, Aurora, Masaya, Masato, and the Student Council. The member of the school's Student Council created this network. The aliens betrayed them and sent them into the city. They all try to work their way to the "exit". Ishtar is the user controlling the city. Throughout the city , monstrous creatures known as VR City Hunters pop up and attack. When Rune gets attacked by a Hunter, Quark shows up and saves her. However, Rune gets taken away by Ishtar and nearly dies from the senses of the Ishtar System. She is then stuck in an empty space in which she meets the Space Queen. The Student Council members later come across an area known as the "perception space", which draws from a person's subconsciousness and presents them with their strongest emotions. The lead member of the Student Council gets lost and she meets up with Masaya, who  later finds out that Masato is a clone. Soon afterward, Rune is revived, and she and Quark battle against the forces of the Ishtar System, and everyone trapped inside the net are finally able to escape. The Six Warriors. The Space chose six people from Earth to fight the newly awakened Gald. She made them each bear the Crest of the Sun. In volume one, Rune bore the Crest on her wrist. Masaya had borne it on his right wrist, and Masato had it marked on his left wrist. In volume two, Aina revealed to have the Crest on her  ankle. In volume four, it revealed amidst the battle that Quark had the Crest on it wrist, then later revealed that Chat-kun was also a "chosen one", due to the Crest on his belly. The Truth About Gald and the Space Queen. According to book four, Gald was a program created by the Space Queen, who was able to sneak some of his DNA and transform him into a human being with it. The Space Queen fell deeply in love with Gald, which created Ishtar, who is merely the Space Queen's feelings. Ishtar became a virus and made  Gald powerful. After the failure of the last invasion decades ago, the Space Queen sent a message to ordinary people of the Earth, including Rune's grandfather, and they have all responded. The Space Queen then chose warriors to fight and defeat the invasion. Just as she puts an end to the battle, she tells Rune to help transform Ishtar. Ishtar becomes a baby human. Gald completely changes and assures the Space Queen that he will raise and protect Ishtar, as well as protect the Earth from future peril. The Six Elements. According to volume two, the six Elements together  resemble the Crest of the Sun. The Core makes up the center and is the most important part, while the five Elemental spokes surround it, supporting it with power. Each of the chosen warriors make up the Elements, Rune being the Core, and the Elements are needed to start the Great Attractor by the aliens. The heroes must collect all the Elemental pieces in order to prevent them from falling into the aliens' hands. There are, of course, six characters who bear the crests: Rune, Masaya, Masato, Aina, Quark, and Chat-kun.