Will allies testify against Donald Trump?

Jenna Ellis, another former ally of former President Donald Trump has taken a plea deal in the Georgia election subversion case. She pleaded guilty to a felony charge for her part in the effort to overturn the 2020 presidential election in Georgia. Ellis is the fourth co-defendant to strike a deal with Fulton County District Attorney Fani Willis. Now the question remains, will they testify against their old ally?