Heather McCrimmon

Heather McCrimmon was a companion of the Doctor.

Biography
Heather was, in her native time, a history student at Edinburgh University. She joined the Doctor so that she could experience historical events first-hand for her history essay. (DWAM: The Chromosome Connection)

It is suggested she is a descendant of Jamie McCrimmon, a companion of the Second Doctor.

Heather was later joined in her adventures with the Doctor by Wolfgang Ryter.

Heather is forced to depart the TARDIS and the Doctor in her final adventure Dead-Line. She returns back to Edinburgh university to meet her professor but is lead into a trap by the alien from her first story in Chromosome connection.

Heather is effected by the Alien's machine that if she take a single trip in the tardis she would be ripped apart by the time radiation that the TARDIS protects you from, she gives an emotional goodbye to the doctor saying at least she is back at home.

Personality
to be added

Continuity

 * The World Shapers in Doctor Who Magazine, which featured a much older Jamie McCrimmon had implied that he died before having any descendants.
 * In the order of publication, Heather became the Doctor's companion after Donna Noble. Given statements made in the post-Journey's End era regarding the Doctor refusing to take on ongoing companions after Donna, Heather's presence either violates TV continuity, or take place at some earlier point in the Tenth Doctor's life, likely between DW: Voyage of the Damned and Partners in Crime.
 * ''The Doctor takes on companions in DWM: Thinktwice, IDW: Silver Scream, NSA: The Slitheen Excursion and TDL: The Depths of Despair, hence doesn't really violate continuity.

Creation
Heather was created by 10-year-old Joanne Hall in a competition sponsored by Doctor Who Adventures to create a new companion to appear in the magazine's comics.