Dan Fei is a Seal Guardian and recurring supporting character in Thunderbolt Fantasy. She hailed from the Sword Forging Shrine in charge of guarding the Tian Xing Jian, but after the invasion of the Xuan Gui Zong and the death of her brother Dan Heng, she embarked on a quest to retrieve the Tian Xing Jian from the villainous Mie Tian Hai and protect her clan's traditions.

Dan Fei takes pride in her heritage as a Seal Guardian, which makes her quite stubborn and tense when it comes to issues regarding the Tian Xing Jian, but she's also shown to be fairly naïve due to being inexperienced with the world outside of her shrine.

In an Eastern-styled fantasy setting, a brother and sister team of sacred guardians is beset by the Xuan Gui Zong, minions of Miè Tian Hai, who seeks the Tian Xing Jiàn sword that they possess. Hai's appearance leads to the defeat of the brother, but his sister, Dan Fei, jumps off a cliff to temporary safety. Later, a wandering swordsman comes across a ruined temple, where a statue of Buddha is protected by an umbrella against the rain. When he takes the umbrella for himself, a man resting under a tree nearby informs him that he must be compassionate to the next traveler he meets as a trade-off for taking the umbrella. That next traveler is Dan Fei, still being pursued by the Xuan Gui Zong minions. Both his promise and the enemy's sorcery leaves the wanderer unable to avoid getting involved. 
 
(Source: Anime News Network)

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A voice actress and singer.

**Non-Anime Roles:**
• Seele Vollerei - Honkai Impact 3rd, Honkai: Star Rail (VG)
• Kaavi - Mahjong Soul (VG)
• Hiyori Tsuchinaga - Blue Archive (VG) 

The fourth season of Thunderbolt Fantasy: Touriken Yuuki.

Theatrical follow-up to Thunderbolt Fantasy: Touriken Yuuki 4.

In an ancient kingdom, a vicious warlord is on the hunt for a magic sword. Dan Fei has spent her whole life guarding the coveted Sword of Divine Retribution–legends say its power is great enough to smite demons and shake the heavens. The master of the evil Xuan Gui Zong sect will stop at nothing to possess it, and dispatches his warriors to steal the holy blade. Fleeing their pursuit, Dan Fei must rely on the unexpected help of two unusual strangers, who are powerful swordsmen themselves. Like a thunderbolt from the blue sky, a thrilling wuxia fantasy saga begins! 
(Source: Seven Seas Entertainment)

A side story of Thunderbolt Fantasy from Dan Fei's perspective.

Fei Dan