As far as the tv show goes, the companion he has had the strongest attachment too emotionally was Amy Pond, however, he did fall in love with one named Rose Tyler.
But the one he traveled with the most was Sarah Jones Smith, who not only was the longest companion (based on episode appearances) but she was also the only (so far) classic who companion to go on an adventure with the Doctor in the New Doctor Who. The Doctor also even gave Sarah the K-9 Unit. There has also been a spin off show called the Sarah Smith Adventures.
So arguably it has always been these three names that come up when a question like this is asked.
The doctor's companion in 2009 was Amy Pond. The actress's name is Karen Gillan.
His new full time companion, Clara played by Jenna Louis Coleman.
His new assitant/companion is a woman called Jenna-Louise Coleman :)
Allonsy. :) On the way, ask this question: " What is the doctor's first companion?
In Doctor Who, the Doctor's current companion is Amy Pond.
The only Classic Doctor Who episode in which the Doctor had no companion is 'The Deadly Assassin'
The next full-time companion is Amy Pond but in the mean-time wilferd Mott will be a part-time doctor in 'The end of time' And previously Lindsey Duncan was the part-time companion in 'the waters of mars' and Michelle Ryan in 'Planet of the dead' The last full-time companion was Donna Noble
The Doctor and his companion are the heroes.
the doctor's proper name
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Taylor s.
Karen gilan