Fen Feilin is a character from the anime Gate Keepers. She is a girl in her early teens who stands at 138 centimeters tall and was born on March 3rd. Her black hair is usually styled into odango buns, and she is often seen wearing a qipao and stockings, reflecting her Chinese heritage. She hails from the Shanghai branch of the organization A.E.G.I.S. and is known in some sources as the Gate Keeper of the Hundred Beasts, though her primary ability is the manipulation of fire.

Fei is sent to the Japanese branch to assist her colleagues in combating the increased activity of the mysterious beings known as Invaders, and she ultimately chooses to remain with the team in Tokyo. Her personality is that of a lively and active girl, though she comes from a complicated family background, an aspect of her life that has contributed to her emotional depth. This complexity is particularly evident in a notable episode where she befriends an elderly man who cares for stray dogs. She becomes deeply worried when she suspects he might be connected to the Invaders, driven by a profound fear of reliving the pain she experienced when she lost her own grandfather. Her loyalty and compassion for others are strong motivating factors in her actions.

Her primary mission is to provide support in the fight against the Invaders, bringing her unique skills to the team’s battles. Her closest companion is Ukiya, a small golden monkey who is also a licensed agent of A.E.G.I.S. This partnership sometimes leads to amusing confusion, as her pet’s name sounds identical to that of her teammate Shun Ukiya. In combat, Fen Feilin wields the Gate of Fire, allowing her to generate potent fiery attacks. Among her signature techniques are Da Xiong Mao, which creates an exploding panda-shaped fireball, and the Shocking Fire Dragon, a powerful attack in the form of a fiery serpent.