|Cover of Unlimited Fafnir Volume 4, featuring Firill Crest|
|Kanji||銃皇無尽のファフニール 4: スピリット・ハウリング|
|Romaji||Jūō Mujin no Fafunīru 4: Supiritto Hauringu|
|Published on||April 2, 2014|
|Published by||Kodansha Bunko|
Spirit Howling is the fourth volume of the Unlimited Fafnir series. It was released on April 2, 2014.
The contract with Yggdrasil. And that the compensation is the loss of memories. Iris, to whom Yuu confided his secret, decided to try and regain his memories. At that time, the girl who was designated as the worst disaster D, Kili, reappeared at Firill’s birthplace, the Principality of Erlia. In order to escort her to Midgard, Yuu and his friends head to Erlia. With Firill’s parents being the royal family, Yuu and the rest enjoy extraordinary events, such as the royal ball. However, before them appears the soul-consuming gold demonic bird—'Yellow' Hraesvelgr.
“Promise me—no matter what happens, absolutely do not forget this.”
No matter what I lose, I will protect you. With all of my soul—. The fourth volume of the Unlimited School Battle Action starts!
- Chapter 1 - The Princess Who Fights Dragons
- Chapter 2 - Silver-Armored Hreidmar
- Chapter 3 - "Yellow" Hraesvelgr
- Chapter 4 - Noah of Soul Destruction
|Volume List||Dragon's Eden • Scarlet Innocent • Crimson Catastrophe • Spirit Howling • Midgard's Carnival • Emerald Tempest • Black Nemesis • Amethyst Rebirth • Cerulean Engage • Invisible Successor • Prismatic Garden • Darkness Disaster • Stardust Cry • Rainbow Piece • Unlimited Shine|
|Extras||Brynhildr Valkyries • Short Stories|