Nanna was a droid designed for childcare, possessing a feminine personality, and classified as a nanny droid.
Initially, Nanna was the property of Leia Organa Solo and her primary function was the care and supervision of her offspring: Jacen Solo, Jaina Solo, and Anakin Solo.
Subsequently, Nanna's ownership transferred to Luke and Mara Jade Skywalker, where her role shifted to safeguarding their son, Ben Skywalker.
Equipped with specialized "devotion circuits," Nanna was programmed to prioritize Ben's safety above all else. Despite Ben occasionally managing to deceive her into deactivation, Nanna was a formidable guardian, secretly armed with potent blaster cannons hidden within her upper limbs.
Nanna represented a fusion of a redesigned YVH 1 droid, manufactured by Tendrando Arms, and a TDL nanny droid. Her outward appearance was that of a kind, cherubic face, belying the powerful combat capabilities concealed beneath.