Patricia "Trish" Jarvis is a character in Friday the 13th: The Final Chapter, played by Kimberly Beck.
A local of the Crystal Lake area, she lives with her mother, Tracy, and younger brother, Tommy. Trish and Tommy meet a man named Rob Dier in the woods, who claims to be hunting bears but is actually searching for Jason Voorhees, the man who killed his sister, Sandra (a character in Friday the 13th Part II). Trish and Rob discover that Jason has murdered a group of teenagers vacationing next to the Jarvis house. When Rob and her mother are killed, Trish is forced to protect herself and her brother from Jason, fighting him off with a machete while Tommy distracts him. She is last seen being visited in the hospital by Tommy after he kills Jason.
Trish can be seen briefly in Friday the 13th Part V: A New Beginning along with her mother in a photo belonging to Tommy. In the mockumentary called "The Crystal Lake Massacres Revisited", (included in the extras of the 2009 DVDs) it is mentioned that Trish was the one who had Tommy institutionalized after he was having difficulty adjusting to life after Jason killed their mother. Trish did not want to have Tommy committed, but in the end agreed it might help him. She also visited Tommy during his six-year stay, but the visits were lessened due to lack of progress.