In Oliver Twist, Fagin is described as a bad guy all around. Dickens' characterization of him is stereotypical and does make some readers uncomfortable because of the prejudiced tone. In the story, Fagin's character is responsible for training Oliver to be a thief.
One quote that supports the fact that Fagin is full of greed is the following:
‘If you do it well, a pound, my dear. One pound,’ said Fagin, wishing to interest him in the scent as much as possible. ‘And that’s what I never gave yet, for any job of work where there wasn’t valuable consideration to be gained.’
In this quote, Fagin reassures someone regarding the amount of money he/she will be given once a job is done. Note that Fagin states he has never given even a pound (about $2.00) away before and that he had not even considered giving in the past unless he was to get something in return.