Martha "Dumptruck" Dunstock

Plot
Her first appearance is in the school’s cafeteria. Heather Chandler, the leader of the popular, proposes Veronica writes a fake note adressed to Martha from one of the jocks. Hesitating, Veronica go through with it, they slip it onto her tray as she passes them. Martha finds it on her tray while eating and she exchange looks from the note to Ram in a nervous and hesistant manner.

As she’s mustered ther courage to finally confront him, she fiddles with the note a little before placing it down on Keith’s tray. Following a long silence is an eruption of laughters from the table and she escapes back to her table.

Sometime after Chandler's suicide, camera men arrives at school and she crams down to hide under the table and avoid the lenses of the cameras. J.D takes a seat by the table, unaware of Martha’s presence until she moves up to the seat again, where his mere reaction is, “Greetings and salutations!”

As the suicide rate at Westerberg High inflates, Martha takes a hit at it and attempts to end her life with a suicide note taped onto her t-shirt. Rumours spread about the event and known to just be “another example of a geek trying to imitate the popular people at school”, as Duke expressed it.

Trivia

 * In an alternate ending of the movie Veronica was going to greet Martha and she would stab her and call her "Heather".
 * Her suicide note was adressed to the school.