Peri Brown

Peri Brown was a companion of the Sixth Doctor and would've rejoined him at a later date.

Biography

She traveled with the Doctor.(He Jests at Scars... (audio story))

A Life that Might Have Been

Had the Valeyard not won and killed the Doctor in the Matrix when merging with him, Peri would've traveled with the Doctor again at a later point. (He Jests at Scars... (audio story),The Widow's Assassin (audio story))