Alan Nguyen, 24, faces charges of Involuntary Manslaughter, Endangering the Welfare of a Child, and Recklessly Endangering Another Person.
Mia Andujar, 7, was shot in the face at a home on the 3800 block of I Street on Sunday afternoon.
Police believe Mia and a 2-year-old were alone in a second-floor bedroom with an unsecured gun.
Investigators had initially said a second adult in the home would also face charges, but so far Nguyen is the only person charged.
Police say the investigation into this fatal shooting continues.