Teliko was a member of the Hostage Rescue Team (HRT) for the FBI.
The daughter of an American father and a Japanese mother, her name in Japanese was originally "Teruko," meaning "shining child." When a typo rendered it as "Teliko" upon joinging the HRT, she decided to keep it as such. In her past, she once served under Roger McCoy. Her father was murdered by corrupt statesmen, though it was successfully covered up as a suicide. Teliko knew the truth however, and vowed to bring her father's murderers to justice.
Prior to Solid Snake's infilitration of Lobito Island, Teliko and her unit were sent in, though her team was wiped out and she was captured by Lt. Leone. Later she was forced to play a game with Snake in "Dream Town" - a fantasy gameboard-type room. Afterwards, Teliko assisted Snake in his mission and eventually discovered that La Clown was the one responsible for the death of her father.