TV-Series
Description
Fei Shinruu is a character from the anime Gravion Zwei. She is a young Earth woman in her late teens who serves as a captain in the Earth Federation Forces, leading the G Soldier unit.

Fei's background is deeply tied to Klein Sandman, the mysterious leader of the Gran Knights. She spent her childhood at his orphanage, where she learned combat techniques under his tutelage. It was there that she formed a close, sibling-like bond with another orphan, Tenkuji Toga. However, her deep affection and respect for Sandman, whom she calls uncle, turned to feelings of abandonment when he selected Toga, not her, to be the pilot of the super robot Gran Kaiser. Feeling discarded, Fei left Sandman's estate and dedicated herself to rigorous training at a special military academy, driven by a powerful desire to prove her worth and make Sandman regret his choice.

Personality-wise, Fei is a strong-willed and determined individual. Her early experiences left her with a deep-seated trauma that manifests as a pronounced cleanliness obsession, or mysophobia. Despite her tough exterior and military discipline, her core motivation is a conflicted mix of lingering affection for her former guardian and jealousy towards Toga, who she believes was unjustly favored. Initially, this causes her to be an adversary, but her fundamental nature is not malicious; it is rooted in a need for recognition and acceptance.

In the story, Fei is initially positioned as an antagonist who clashes with the main characters. She pilots a Gran Trooper, a type of mecha used by the Earth Federation, and her skills are formidable. However, as she witnesses Toga, Sandman, and the others fighting earnestly against a greater threat, her hardened resolve begins to waver. She gradually rebuilds her trust in them, overcoming her earlier feelings of envy. Her development culminates in a critical moment during the final battle against Zerabaya. When she finds herself in a desperate situation, Sandman arrives to save her in God Sigma Gravion, offering her the praise and acknowledgment she had always sought, finally allowing her to accept his paternal affection.

Fei has significant relationships that shape her character. Her dynamic with Klein Sandman is central, evolving from loving student to resentful rival and finally back to a trusted ally. With Toga, her history as a childhood friend creates a complex bond that mixes fondness with competition. Within her own unit, she is the respected commander of subordinates like Alex Smith. A notable relationship is with Mizuki Tachibana, a fellow pilot. Although Mizuki is her senior in age and Fei holds a higher rank, Fei looks up to her and affectionately calls her big sister.

Regarding notable abilities, Fei is a highly capable and well-rounded combat pilot. Her skills are particularly focused on defense, making her an excellent choice for protective maneuvers in battle. Her personal mecha, the Gran Trooper, is equipped with powerful weaponry, including a special attack known as the Lightning Detonator which she uses with great effectiveness.