Change of Allegiance: Shifting Sides Gear and Opal have tracked down the terrorist organization that blew up Segua Castle and are now ready to take down the gang's leader: Opal's father Koil! Will the two killers be strong enough to bring Koil to justice? Meanwhile, as the war between Segua and Ninteldo rages on, Tejirov, the master strategist, decides to switch sides. Can Gear convince him to stick with Segua, or will the two friends become mortal enemies? Anastasia Shestakova is the author of World War Blue . Crimson is a Japanese manga artist best known for his work on World War Blue.