Antarctica O'Kane

Antarctica O'Kane is a longtime Mark Gatiss fan and one of the original members of the Sherlock fandom.
As a fanfiction author, she writes Mystrade novellas and is currently publishing The Personal Journal of Mycroft Holmes series. 
Antarctica O'Kane is a pen name and online pseudonym created in honour of Mark Gatiss.
Antarctica, the code name from The Six Thatchers. O'Kane, Mark's mum's maiden name, which he also used in P.R.O.B.E.
The associated penguin logo was created by "ginapeb" and features a penguin standing on an iceberg, representing Antarctica, and a shamrock breaking through the ice, representing Mark's mum's Irish heritage. The penguin wears Mycroft's suit and holds his brolly (or swordgunbrella, if you like).