Walter Simeon's mother

From Tardis Wiki, the free Doctor Who reference

One winter's day in 1842, Walter Simeon's mother urged him to play with the other boys, noting that his solitary nature was unhealthy. He ignored her pleas, declaring that he didn't need anyone else.

She was not present when the Great Intelligence first animated a snowman to mirror and communicate with the young Walter, having walked away with a man. (TV: The Snowmen)