She is a TV announcer shown occasionally interviewing RD.
She first appears in episode 11 where she has a crush on RD. She is later seen in the final two episodes among the people oppressed by Alpha Richter and supports her love interest RD to defeat him.
In episode 5 there is a character seemingly identical to Tracy (aside from a hair clip), called "Chiara". Chiara is the name of the person who did the English voice of Amy. They serve the same role in the show (TV presenter swooning over RD). Tracy and Chiara had different voice actors.