Gender: Female. In the center of her chest is a Tacet Mark that appears when the seal is broken. In addition to shoulder straps, her dress is secured by golden sealing chains. Her skirt is extremely short, making her underwear almost visible. Her underwear is black lace, featuring a black ribbon with white in the center. Her main colors are white and black, representing her dual nature. She is a student at Star-Torch Academy and simultaneously a spy for the Fractidus. When the sealing chains are broken, Dania becomes aggressive. In that state, her appearance is unified in black and purple. Her usual personality is polite. Dania is a Resonator of Aleph-1, but this is not well known at the academy. About Star-Torch Academy: Built on the Roy Icefield, once a frozen wasteland, through the cooperation of the international scientific organization "Space-Trek Collective" and the local "Roy Clan." It has a vast underground urban structure and has developed into a utopia where knowledge flows freely and diverse cultures resonate. If civilization is the crystallization of humanity's collective will, then "Tacet Discords" are the reflections of the sorrow and darkness lurking within that collective will. Overlord Class: A catastrophic TD disaster that manifests as a calamity worldwide. The highest grade and considered extremely dangerous. About Aleph-1: A "Void" Tacet Discord from beyond Solaris that swallows existence. It takes the shape of a giant eye floating in the void. Observations by the Tethys System show its frequency has no commonality with any TD on Solaris, suggesting it may not have been born from any known civilization. It is a cosmic-scale calamity that has crossed the sea of stars and destroyed many civilizations; it is currently sealed beyond the Strider Gate, a passage leading to outer space. It possesses the "Void" attribute, and a hypothesis exists that it erases everything. However, its true form closely resembles a black hole. Unlike previous opponents, it is described as an entity that has already "achieved its purpose = swallowed its home civilization." Its interior is a high-dimensional space called "Void Space" located deep within high-concentration Void Matter, where the order of space-time is chaotic, and things swallowed in different eras may appear in the same place. Living humans cannot remain there; only the dead or those with unstable frequencies can observe it. About the Fractidus: A fanatical organization that views the Lament as a process of world evolution, holding the mad ideology of triggering the true Lament to fuse and reconstruct humanity and the world. Composition/Technology: Composed of orphans from previous civilizations, they primarily conduct experiments to fuse humans and TDs using mechanical modification technology.