Bio

Molly has a crush on Sherlock Holmes, which he frequently exploits to get her assistance. Molly is socially awkward, but dedicated to helping Sherlock. She cares for him, and it hurts her that he is so cold and dismissive towards her.

Sherlock seems to know she has feelings for him, yet remains impassive whenever she attempts to further their relationship. At times, he is quite rude to her. Sherlock seems content with remaining acquaintances and sometimes work colleagues. However, by the end of series two, it is demonstrated that he cares for her too, but in a platonic context.

As their friendship progresses, her romantic affections for him become muted, if still lingering ever-so-slightly between the two. It is revealed in the Empty Hearse that she is the "One person that matters the most" to Sherlock. However, it is unclear whether this mattering is in the context of Sherlock's emotions or in the overall completion of his faked death plan.

When Molly was engaged, the dynamic between the two shifted – Molly claimed she had moved on; yet traces of her previous crush still linger. The fiance dresses and looks remarkably like Sherlock, something everyone – including Sherlock – notice, but refuse to announce to her. It doesn't take long for her relationship with Tom is starting to signs of wear and annoyance for Molly. It is clear that, although he might look and dress like Sherlock, Tom is not half as brilliant. The engagement between the two is shown to be broken off. No reason is specified, however.

Molly and Dr John Watson do not interact much, and when Sherlock is around she sometimes neglects to remember his name. However, it is obvious that John likes Molly platonically and holds her in high esteem. This is not only for her various efforts in helping he and Sherlock solve cases, but also because of her sweet, unassuming personality. Moreover, John – aware of her crush on Sherlock as well his friend's lack of reciprocation of these feelings – feels sorry for Molly for all the times Sherlock uses her infatuation to manipulate her into doing whatever he asks. He often chides Sherlock for his behavior against Molly and tries to make him treat her better.