Medium Ranged Voice, Almost Robotic Alien like tone.

Or go for something you think would suit the character.

The spirit of the Goddess Sword sealed inside the Statue of the Goddess in Skyloft. With extensive knowledge and a highly analytical mind, Fi thinks things through logically and offers advice and wisdom to whoever holds the sword. Her body is made of a blue, metal-like material. Fi floats and moves in the air, and transforms into a sword to attack.