Sean 'Diddy' Combs' ex-girlfriend Cassie Ventura, who was the first to testify at his recent sex trafficking trial, was also often the recipient of the rapper's short temper and rage, RadarOnline.com can report.

Without Cassie, Sean "Diddy" Combs would not have faced trial. She has emerged as a powerful figure after bravely telling her story in a New York courtroom.

The “Me & U” singer testified against her ex back in May, just days before welcoming her newborn son with husband Alex Fine.