'Yellow' Hraesvelgr
Ether yellow

Vital statistics
Name 'Yellow' Hraesvelgr
Kanji '黄'のフレスヴェルグ
Romaji 'Ki' no Furēsuvuerugu
Gender Male
Affiliation Counterdragon
Status Deceased
First appearance
Light Novel Debut Volume 4
Manga Debut
Anime Debut
English VA

'Yellow' Hraesvelgr ('黄'のフレスヴェルグ, 'Ki' no Furēsuvuerugu) is one of the Dragons that appear in the Unlimited Fafnir series. Although it was regarded as impossible to defeat, it was destroyed in the Principality of Erlia by Yuu Mononobe.


Hraesvelgr is rather small for a Dragon, with its entire body being roughly ten meters in size. It is shaped like a bird with golden feathers and is covered by a layer of ether particles which manifests its soul and masks its true size.


At an unidentified time in the past, Hraesvelgr inherited its Authority from 'Golden' Phoenix, transforming into its current form as a result. Hraesvelgr was among the Dragons who emerged into the modern world 25 years before the start of the story. It would often be seen appearing in war-torn areas, consuming the souls of the deceased. A few years before the story began, Hraesvelgr consumed the souls of Ariella Lu's family.


Spirit HowlingEdit

Hraesvelgr made its first appearance in Volume 4, arriving in the Principality of Erlia in order to claim Kili Surtr Muspelheim, who had her dragon mark altered by 'Black' Vritra to match Hraesvelgr's wavelength, as its mate. Although the Counter-Dragon Squad attempted to intercept it, their attacks had no effect due to its soul surrounding its physical body. Hraesvelgr proceeded to immobilize everyone with its ether particles, but upon approaching Kili, it abruptly rejected her, setting its sights on Firill Crest. Before it could do anything, the soul of Firill's grandfather, Albert Crest, manifested and proceeded to attack the Dragon. Hraesvelgr consumed Albert's soul and retreated. Later on, it marked Firill as its mate and engaged the Counter-Dragon Squad one last time in the Great Waterfall of Erlia. There, it was destroyed by Yuu Mononobe's Psionic Multi-Barreled Cannon, Noah, releasing all the souls it had consumed upon its death. After its destruction, its Authority was passed on to Yuu.

Powers and AbilitiesEdit

Ether Wind: Hraesvelgr's Authority, Code Drei, Ether Wind, enables it to manipulate ether particles in order to manifest the souls of living organisms. By surrounding itself with its own soul, Hraesvelgr can render all sorts of interference or attacks ineffective, since souls do not follow the rules of the world. Hraesvelgr can also immobilize people by using Ether Wind to manifest their soul, which however remains sealed inside their body, rendering them unable to move.

Marking: Like most Dragons, Hraesvelgr can mark a suitable D as its mate, transforming her into the same type as itself upon contact.

  • Telepathy: Like all Dragons, Hraesvelgr is able to sense the D it has marked from any distance.


  • Hraesvelgr is the name of a giant in Norse Mythology that could turn into an eagle and was responsible for causing the wind to blow by flapping its wings.