Kusanagi
From The Stargate Omnipedia
Japanese scientist stationed with the Atlantis expedition in the Pegasus Galaxy. It is possible that she has had Dr. Carson Beckett's Ancient gene therapy, but it is more likely that she naturally has the Ancient gene (since Beckett has referenced her as such).
Dr. Kusanagi may be Miko.
DETAILS
FIRST APPEARED - N/A
KEY EPISODE
The Gift - When Dr. Beckett's availability runs thin, McKay and Zelenka request the presence of Dr. Kusanagi to assist them with Atlantis's chair-weapons platform.
The Siege, Part 1 - Plugged into the Ancient chair, Dr. Beckett pleads to be relieved of the duty by offering up Dr. Kusanagi instead.