Calvin McGill

Calvin McGill is the school prankster, and a supporting character of The Trine. In The Roller Coaster Night, Calvin pranks Gabriel, Ruthie and Zachary, telling them that he knows where the cave is. When they express doubt, Calvin assures them them it's not a prank, which of course it is.

As revealed by Ruthie in Cave of History, Calvin is not on good terms with the three friends, as he never apologized for pranking them and getting them lost.