Black Vritra is the first Dragon that appeared in Unlimited Fafnir's world 25 years before the start of the story, engineering the first Dragon disaster, and the progenitor of all Ds. Although an antagonist at first, she eventually allied herself with Yuu Mononobe and his friends in order to face the Ninth True Dragon, enrolling in Brynhildr Class under the alias of 'Ritra'. Vritra initially appeared as a large, black western dragon. Upon taking human form, Vritra resembles a younger version of Kili, with long, black hair and a one-piece black dress. After becoming a part of Brynhildr Class, she started wearing Midgard Academy's standard female uniform. Vritra's true form is unknown, as it resides in a higher dimension from where dark matter originates. Vritra has a serious and straightforward personality, but becomes easily flustered and irritated when teased. Although not very evident, she also cares about Ds and her daughter, Kili, as well as the safety of the world. When speaking, Vritra uses an archaic form of language for reasons unknown. She also comes off as very secretive when it comes to her plans. Vritra refers to her 'past self' as fair and just at all times, as well as holding universal love for all life on Gaia, comparing it to what humans call God. Spirituality of such nobility is something the current Vritra cannot conceive. Because the continuity of self has been broken, she doesn't understand her motives for sacrificing her own body to restore the world that had been destroyed by the Seventh calamity. Her current motive is to not let her past self's efforts go to waste. Vritra appears to have developed a passion for food ever since tasting an ice cream for the first time. She was extremely attentive when she was taught how to make yakisoba and spent all her coupons on food during Midgard's school festival.
Unlimited Fafnir
Midgar, all-girl academy, would have been notable just for the action of accepting its first and only male student, Yuu Mononobe. But Midgar stands out for much more than that: it's a school exclusive to a group of girls known as D's. Each of them have extremely powerful abilities in generating dark matter and manipulating it into powerful weaponry. The D's didn't exist twenty-five years ago, and only appeared after a number of mysterious, destructive monsters known as "Dragons" started appearing around the world. Strangely, just as suddenly as they appeared, they vanished. In their destructive wake, some girls started being born with symbols on their bodies and powers similar in nature to those wielded by the Dragons themselves. Now the D's attend this school, hoping to harness and utilize their powers against the Dragons. Yuu is their latest member and is extraordinary for being the only known male D in existence. Now he must forge relationships with the girls around him, including his long separated sister who attends the school as well, and work with them to investigate and eliminate the threat of the powerful Dragons.
