Uwani Musa Abba Aji ita (an haife ta a ranar 7 ga watan Nuwamba shekara ta alif 1956) masanin shari’a ne na Nijeriya kuma Adalcin Kotun Koli na Nijeriya. An haife Aji a ranar 7 ga watan Nuwamba, shekarar 1956, a Gashua, Jihar Yobe. Ta yi karatunta na farko a Makarantar Firamare ta Gashuwa a shekarar 1961 sannan ta wuce makarantar sakandaren 'yan mata ta Gwamnati, Maiduguri inda ta samu takardar shedar makarantar Yammacin Afirka a shekarar 1972. A shekarar 1976, ta samu difloma a fannin shari'a daga Jami'ar Ahmadu Bello ta Zariya sannan a shekarar 1980, ta sami L.L.B Hons daga wannan makarantar. Aji an kira ta zuwa Bar a shekarar 1981, kuma a shekarar 1982 ta fara aikin ta a matsayin lauyan gwamnati. Abba Aji an nada ta a matsayin Lauyan Gwamnati a shekarar 1982. Tun lokacin da aka nada ta a matsayin Lauya ta Jiha, ta zama Mukaddashin Babban Lauya a shekarar 1984, da Babbar Majistare ta II a shekarar 1986, da Babban Majistare ta I a shekarar 1987, da Cif Majistare II a shekarar 1989, da Cif Magistrate I a shekarar 1991, da kuma Chief Registrar a watan Nuwamba shekarar 1991.