Grande Rosso is an Al created by Hozuki, for the mechanic Galileo. It also guides whoever is using the mechanic such as Hozuki Ferrari.

Grande Rosso was based off of Picco Rosso, a real goldfish that Hozuki visits everyday, but due to the loss of its home, there is no evidence if Picco Rosso is still alive. Grande Rosso can be activated when someone reads the manual using the technique "Voice Recognition".

(Source: Galilei Donna Wikia)