Tommy Brockless
Tommy Brockless was a human born on February the 7th 1894 in Blackley, Manchester. He was the son of Constance May Bassett and Thomas Campbell Brockless. He fought in the first world war on the side of Great Britain in the 10th West Yorkshire regiment. In 1918 he suffered shell shock and was admitted to St Teilo's Military Hospital in Cardiff.
While he was there time-shifts started to occur, fractures in the rift meaning that two slices of time were erupting into each other. Torchwood 3 investigated and though they could not determine at what point in the future the other slice in time existed, they recognised Tommy in one of the fractures and decided to put him in stasis and wait until the hospital entered the other side of the fracture.
Over the years they unfroze him a day each year, giving him an unique perspective on the following century. As they had frozen his most recent memories, the shell shock was not an issue during these awakenings. In 2008 anomalous activity finally returned to the now-abandoned hospital, and the crew of Torchwood 3 sent Tommy back through the shift to 1918, so his life would be like a thread, stitching time back together again.
Sadly, when he returned his shell shock also came back, and three weeks later he was shot by a firing squad by the British Army for cowardice. (TW: To the Last Man)