Cho was a Glader who appeared in the film. He is a minor character in the movie and is not mentioned in the book. He is most likely named after Henry Cho.
As far as the movie, Cho is shown multiple times but only in the background or briefly mentioned by another character.His most notable appearence is when Thomas and the other Gladers venture into the Maze to escape.When the grievers ambush the glade he is not visible on screen but can be seen in the back of the group when Alby is taken.He is also briefly seen when Ben is banished and also when Thomas,Alby and Minho escape the maze alive.He is finally seen picking up his spear when Thomas is giving instructions in the maze escape.During the escape from the maze Thomas and the other Gladers fight off Grievers to make their way into the escape tunnel. A Griever slams its tail into the ground which ruptures the floor and causes Cho to slip and fall. Another Griever manages to grab Cho and throw him off the edge, presumably to his death. He is the first Glader to die in the escape from the Maze.