He as know to be very trustworthy to his master, Lucentio. Some advice he gives Lucentio is "Forget studying, you should really meet some girls while you're in Padua." meaning he cares about his master he is not just a slave; they have a special bond. He will go out of his way to do what is needed for his master. He tends to treat his master with nothing but kindness and loyalty.
The Taming of the Shrew: Act I, Scene 1