Iris Freyja

Iris Freyja is one of the main characters from the Juuou Mujin No Fafnir anime and light novels.

A member of Brynhildr Class and of the Dragon Subjugation Squad, Iris is the very first person Yuu meets on Midgard. After killing Basilisk, Iris inherits its authority.

In the AWA fics, Iris is listed as a purchased prisoner from the Slave Fortress.

Appearance
Yuu describes Iris as a pretty, young girl with fair skin, a large bust and pink eyes. She has extremely long, silver hair, which are usually accessorized with a ribbon. She is usually clad in Midgard Academy's standard female uniform and wears white knee high socks with black ribbons. Her dragon mark is located on her upper left abdomen.

Personality
Iris is portrayed as a clumsy and air-headed person, evident by the fact that she often forgets to wear panties and tends to lose her swimsuit whenever she swims. She can also be somewhat childish at times and a little slow on the uptake, something which she's shown to be very insecure about. However, Iris is also a very strong-willed person, having joined Midgard of her own volition after awakening as a D due to her belief that she had to step forward and fight the Dragons. She can also be quite persistent, as she refused to give up on attacking 'White' Leviathan, even though the situation was almost hopeless. She is very open-hearted, being the kind of person who easily forgives someone and attempts to get along with them. An example of this is the fact that she easily socialized with 'Black' Vritra, despite the fact that Vritra is a Dragon and an enemy at the time. Iris is also someone who doesn't hold on to negative feelings like hatred or revenge, although she enjoys getting back at others in a light teasing manner. Surprisingly enough, when Iris took a personality test, the result was that she had the traits of a sadist, a fact that greatly astonished others. Iris can also be quite bold when displaying her affection for Yuu Mononobe (examples of this include Iris entering the bath alongside him or undressing in front of him), but can get embarrassed as well.

Abilities
Dark Matter Generation: Like every D, Iris can generate and manipulate dark matter. However, any transmutation that Iris attempts always ends up in an explosion, even the transmutation of Mithril, which is theoretically impossible to explode. Thanks to Yuu's help, Iris was able to utilize this trait as a powerful offensive weapon, with her high-level spatial awareness granting her great precision when targeting something with her explosion, along with being able to perfectly direct it.
 * Caduceus: Iris' Fictional Armament, which takes the form of a long, silver-white staff. Iris usually chants an incantation, 'Come, come, fragments of the Far Beyond...', before performing transmutation.
 * O Holy Silver, Explode: By transmuting Mithril, Iris can generate an explosion with power equivalent to that of a Mithril grenade at long distances. The explosions were capable of penetrating Leviathan's repulsive field and even caused great damage to Basilisk.
 * O Bullet of Wind, Crush It: Iris transmutes Dark Matter in front of her staff, which gathers the wind around her into a massive amount of compressed air that is fired as a projectile. Depending on the air's compression ratio and speed, it can produce an impact capable of shattering diamonds.
 * O Raindrops, Scatter: Iris manifests Dark Matter around her target and transmutes it into water drops that fall on them and explode due to her unique ability.
 * O Gale, Explode: Iris transmutes wind into compressed air which causes an explosive storm. This attack was shown to be strong enough to partially destroy the giant Hekatonkheir.
 * O Holy Silver, Descend: Iris transmutes Dark Matter into countless fragments of Mithril that rain down and explode around her target.
 * Caduceus Catastrophe: After Basilisk's defeat, Iris inherited its Authority, Code Fünf. When channeling her Catastrophe through her staff, it turns red and enables her to fire red beams which can weather down objects as if two thousand years have passed in an instant. Unlike Yuu and Mitsuki, Iris can channel her Catastrophe directly without having to transmute it from dark matter and in a scale that surpasses Basilisk's power. However, Iris' body started changing into that of a Dragon the more she used Catastrophe. During the battle against Kraken Zwei, Iris' body further dragonified because of her desire for more power and she displayed the power to fire the enhanced version of Catastrophe from a third eye generated on her staff, as well as the normal form from her eyes. However, after being selected by Yuu Mononobe as a mate and turning into the same kind as him, the changes on Iris' body were reversed and she now requires dark matter transmutation in order to generate Catastrophe. In order to fully envelop massive targets like 'Eternal Longevity' Bahamut with Catastrophe, Iris has to sacrifice power output to increase the area of effect's size, resulting in a lower acceleration of time. However, after discovering the location of her Authority, Iris was able to use the full potential of her Catastrophe by generating a third eye on her staff and firing the enhanced form of Catastrophe directly from it to destroy Bahamut.

Code Lost: In Volume 10, Iris acquired a part of Code Lost after Yuu split the scrapped Authority between his mates.
 * Biogenic Transmutation: In Volume 8, Iris performed biogenic transmutation to generate a third eye on the tip of her staff in order to fire the enhanced version of Catastrophe. She was shown performing this feat once more during the battle against Bahamut in order to once again generate the Third Eye of Catastrophe.

Code Neun: As one of Yuu's mates, Iris possesses his Authority, Code Neun. While the true nature of the Authority and its full capabilities are unknown, it was shown to be capable of suppressing the Ninth True Dragon's End Matter.

Trivia

 * Caduceus is the name of the staff used by the god Hermes in Greek Mythology.
 * Iris' surname originates from Freyja, goddess of beauty and love in Norse Mythology.
 * Due to her name and the fact that she's used to cold climates, it's possible that Iris comes from a northern European background, most likely a Scandinavian country.
 * It's implied that Iris kept Yuu's shirt from their first meeting, and that she often sniffs Yuu's lingering scent, hugs it against her bosom and wears it as sleepwear.
 * In the anime, Iris was able to use her explosion without training, whereas in the light novel, she had to undergo special training alongside Yuu in order to master its use.
 * Yuu has theorized that Iris' explosions are a result of her power being used incorrectly (much like how machines break down if used in the wrong way), speculating that she might be capable of something amazing if she could properly use her powers.
 * Iris' seat in the classroom, on the back row next to the window, belonged to Haruka Shinomiya back when she was a student.
 * Iris is one of the only four girls to have kissed Yuu on the lips so far.
 * She also holds the record of the most kisses with Yuu.