A Fei is Obito Uchiha.
Chinese name: Uchiha Obito
Foreign name: うちはオビト?
Other names: A Fei/Kite
Dubbing: Komori Sosuke (boy, Kakashi Gaiden amp; theatrical version amp; game version), Naoya Uchida (when calling himself "Uchiha Madara")
Appearance works: "Naruto" series and derivative works
Birthday: February 10 (Aquarius)
Age: 13 (at the time of disappearance) → 31 years old (at the age of 10)
Gender: Male
Blood type: O
Height: 154.2 (13 years old)→175 ("A Fei")→182cm (31 years old)
Weight: 44.5 (13 years old)→55.9 ("A Fei") → 70.3kg (31 years old)
Origin: Fire Country, Konoha Ninja Village
Family: Uchiha Clan
Teacher: Namikaze Minato → Uchiha Madara
Nature: kind, enthusiastic, cheerful
Chakra attributes: fire, wind, thunder, earth, water, yin
Characteristics: Ten-Tails Jinchuuriki, Wood Release, Mangekyō Sharingan
Uchiha Obito, an important character in the Japanese comic "Naruto" and its derivative works. A member of the Uchiha clan in the Hidden Leaf Village of the Land of Fire, he is good at using skills such as the time and space ninjutsu "Kamui", Uchiha forbidden techniques, Yin and Yang escape techniques, etc. His story can be said to run through the entire main storyline of Naruto.
Extended information:
The reason for calling him Fei——
Obito participated in a mission and was unfortunately hit by a stone in order to save Kakashi. Saved by Uchiha Madara, in order to make Obito his qualified heir, Uchiha Madara designed it to see Kakashi kill Lin. It made Obito hate the world. Obito's dream has always been to become Hokage, but after that, he put on a mask named Uchiha Madara and agreed with Madara's ideal.
On the night of the Uchiha genocide, Obito's existence was noticed by Uchiha Itachi during the activities. Obito accepted Itachi's conditions. Later, the two teamed up to kill the entire clan; since then, only Uchiha Sasuke, Uchiha Itachi, and Uchiha Obito are left in the Uchiha clan. After the death of the Red Sand Scorpion, Obito joined Akatsuki as a newcomer under the name Fei, inherited the position of the Red Sand Scorpion, and became Deidara's teammate.
Obito has two identities at this time, "A Fei" and "Uchiha Madara". Most of Akatsuki's peripheral members only know him as "Abi", Itachi and the "leaders" Nagato, Konan, and Kisame think he is Madara, and only Black and White Zetsu knows that he is Obito.
Reference: Baidu Encyclopedia-Uchiha Obito