The Advocate
The Advocate was an alien who had escaped the Time War after Dalek Caan saved Davros, following him through into the normal universe as the Last Great Time War was Time-locked. (IDW: Don't Step on the Grass)
The Advocate first met the Doctor when she was at the Shadow Proclamation. She represtented him as his solicitor after they put him on trail for saving Emily Winter's life. The Advocate then found out that "Finch" on the Prosecution had set the Doctor up. She tried to sort it out, but was shot by a Judoon, after "Finch" told her to shut up, apparently killing her. However, this sent her back in time to the events of the Time War; she was left insane and dangerously intelligent. After suffering countless deaths and lives, she found Dalek Caan and used his path as an exit route from the War. Some time later the Advocate found the Gizou who would impersonate Finch and made an alliance with him so that he would send her past self to the Time War. (IDW: Don't Step on the Grass)
She then reappeared in the Finch imposter's cell after he had been found out as a Gizou. He said he was sorry that he failed her, but she said the Doctor held the final part of a puzzle and with the Shadow Proclamation believing her dead that she can move through time and space undetected. (IDW: Fugitive)
Soon after, she staged an attack on the TARDIS by a group of insectoid aliens, damaging the dimensions within. (IDW: Tesseract)
