User:SOTO/Forum Archive/The Panopticon/@comment-1350697-20160118150156/@comment-5918438-20160123064436

From Tardis Wiki, the free Doctor Who reference

She is consistently referred to in credits (as well as book titles) and by the Doctor as Ashildr, but never remembers this name. T:CHAR NAMES means we need to make sure to use the most common name, often the one in credits.

There's also a purely technical aspect: at two characters, readers can't search for it in the search bar, and it won't come up in autosuggest. As a general rule, pages need at least 3 characters, and this particular page is one which is visited a lot by readers due to her extensive involvement in the last series. It would simply make no sense to have her unsearchable.