From Bulbapedia, the community-driven Pokémon encyclopedia.
Infi (Japanese: インフィ Infi) is a character who appears in Giratina and the Sky Warrior. Her Japanese voice actor is 中川翔子 Shōko Nakagawa and her English voice actor is Bella Hudson.
She is the program that pilots the Megarig. Her name is taken from the word "infinity" and her design incorporates lemniscates.
There are holograms of her spread throughout the airship, most likely so that she could scout the Reverse World, without the need to get out and report anything to Zero.
In the credits of the next movie, it was seen that she was recovered from the Megarig by Newton after it was destroyed.