Arietta was born in N.D. 2002 on the Isle of Feres, the sister island of Hod. After the destruction of Hod and the subsequent tidal wave that destroyed the Isle of Feres, she lost her parents and was raised by ligers, eventually learning to communicate with them and other monsters. Arietta lived this way for some time until Van Grants found and removed her from this feral life. When she was seven, Van introduced her to Fon Master Ion, the replica Ion's predecessor, and two years later, in N.D. 2011, she became his Fon Master Guardian. During this time, Arietta developed an affectionate relationship with Ion, who assisted Van in teaching Arietta to read, write, and talk.