Who is Corporal Timlon from Johnny Got His Gun and what is their importance?

Corporal Timlon is a British subaltern at the front who is twice ordered to bury the stinking body of a Bavarian soldier killed by his regiment and tangled in barbed wire. When an artillery shell disinters the corpse from its shallow grave, Timlon nicknames him Lazarus—for rising from the grave. Timlon's colonel orders him to put Lazarus a full six feet under and read the full Church of England funeral service over him. Timlon hurries the reading and as he is finishing, is shot in the rear end. During his convalescence, the regiment is nearly wiped out at the front—and Lazarus rises yet again.