Ensign Giusti is a bridge officer aboard the Enterprise-D in the two-part story Gambit, serving while Data commands the ship during the hunt for the mercenaries believed to have killed Jean-Luc Picard.
Giusti appears in Gambit, Parts I and II, in the seventh season. With Picard reported dead and William Riker abducted, Data takes command of the Enterprise with Worf as his acting first officer.
Giusti is one of the junior officers at the forward stations as the ship tracks Arctus Baran's raider from one plundered archaeological site to the next, relaying sensor readings and carrying out Data's orders during the staged exchanges of fire with the mercenary vessel.
She is a minor figure, but part of the bridge team in a story much concerned with how the ship runs under an android captain and a discontented Klingon deputy.