is a Japanese anime franchise produced by Konami and animated by J.C.Staff. A 30-minute OVA episode was released on August 25, 2006 and a television series adaptation aired on Chiba TV from July 5, 2007, to December 27, 2007. Plot In the year 2071, humanity sees the appearance of mechanical cell clusters, known as WORMs. The technology begins sweeping away the human race on a massive scale, destroying one-third of the human population in just under two years. This leads humanity to overcome their national differences, and unite as a single force. Not being able to turn the situation in their favor, humanity decided to permit the use of weapons of mass destruction. Finally, they succeeded in the annihilation of the WORMs, but after paying an enormous price, and wreaking havoc on the planet. All the major continents were broken apart. Antarctica disappeared, and half of the remaining land mass was submerged. The largest damage this war caused was the loss of 90% of all military-age personnel, namely men in their twenties and thirties. Over a decade later, the WORMs re-appear, to the surprise of those who thought they were eliminated. Characters Sky Girls Otoha is the main master with the sword but is otherwise an unknown in her abilities. She comes from an island where her family runs a dojo. While on SkyMu, she is sweet and naive, in reality, she is feisty, violent, bossy, tough and a latecomer to the scene. She has a twin brother, who one day disappeared while sitting on a rock talking about flying together when a mass of light appeared. He appears later in the series proclaiming he is the WORMs' "messenger". Her Sonic Diver Unit is named Reijin, but she nicknames it "Zero". Eika is the main leader of the team and is quick at making decisions, has fast reflexes, and high stamina. She has a good leadership and more mature than the other two pilots. She excels in overall ability, much more than the other two pilots. This makes her the perfect choice for leading the Sonic Diver Unit. She was skeptic of her teammates, but later she trust them and created a strong friendship between the Sky Girls. The other Sky Girls look up to her and follow her good examples. Overall, she has a serious personality and is a tsundere character. Karen is a genius with an IQ of