Ragna werkt samen met de raadselachtige Crimson om de strijd aan te gaan met de draken die de wereld bedreigen. Hoewel de motivaties van Crimson mysterieus zijn, sluiten zijn doel en die van Ragna perfect op elkaar aan, en samen zullen ze de draken voor eens en voor altijd verslaan.
Nee, helaas is ラグナクリムゾン nog niet beschikbaar op Netflix in Nederland.
| Writing | Daiki Kobayashi | Comic Book |
| Sound | Osamu Sasaki | Original Music Composer |
| Sound | 郷文裕貴 | Sound Director |
| Visual Effects | 水野多恵子 | Color Designer |
| Writing | 赤尾でこ | Series Composition |
| Visual Effects | Endou Makoto | 3D Director |
| Directing | 高橋賢 | Series Director |
| Visual Effects | 青木慎平 | Character Designer |
| Sound | 藤本コウジ | Original Music Composer |
| Camera | 佐藤敦 | Director of Photography |
| Editing | 坪根健太郎 | Editor |
| Art | 込山明日香 | Art Direction |
| Production | Kazumi Saito | Producer |
| Production | 青井宏之 | Producer |
| Production | Akiho Igari | Producer |
| Production | 中西豪 | Executive Producer |
| Production | 木村康貴 | Executive Producer |
| Production | 丸山博雄 | Executive Producer |
| Production | 大和田智之 | Producer |
| Production | 小松翔太 | Producer |
| Production | 成田明浩 | Executive Producer |
| Production | 外川明宏 | Executive Producer |
| Production | Yuki Ogasawara | Producer |
| Production | 宇都宮裕人 | Producer |
| Writing | ヨシダタクミ | Lyricist |
| Art | Daiki Kobayashi | Original Series Design |
