Tessa is the only survivor of the massacre at Elliott Manor, and is an certified technician of JCJenson.
In N's flashback from "Heartbeat" and "Home", Tessa is only shown as a dark silhouette with glowing eyes, having a slim build and a relatively tall stature, although she appears to be wearing a short dress with short sleeves, heeled shoes and a large bow on her head. In images later shown a REDACTED tag is shown, so her actual appearance is not known.