An Enterprise ensign who takes the navigation and science stations in 2268 while Chekov is missing, and finds the faint trail that leads the ship to Triskelion.
Ensign Jana Haines appears in the second-season episode The Gamesters of Triskelion. When Kirk, Uhura and Chekov vanish from the transporter platform before they can beam down to Gamma II, Spock takes command and Haines covers the sensors.
At Spock's direction she scans the surrounding space and picks up a fluctuating energy reading, a kind of ionisation trail leading away from the system. Spock decides to follow it, against the strong objections of McCoy and Scott, who want to keep searching the planetoid.
The trail leads the Enterprise a dozen light years to the trinary system M24 Alpha and to Triskelion. Haines was played by Victoria George.