Larrikin was a mage that occassionally filled in for the Dead Men. He died in Wales about half a year before the War ended. Not a lot was revelealed about him, but he was fondly remembered by all.
It was revealed that Larrikin was the comedian of the group, as recalled by Dexter, Ghastly and Skulduggery at the Requiem Ball. He was known to wind up Anton (the serious one in the group), by leaning in and whispering something in his ear in the middle of a dangerous mission. One of his antics was known as 'Shudder's Birthday'. In 1850, all the members of the Dead Men were down in France, huddled in a field. They had been in that spot for 3 days, and all of them, excluding Skulduggery, were wet and hungry. On the third day, Larrikin decided that it was Anton's birthday. Although their targets were passing by, Larrikin insisted he sing Anton a happy birthday song. He then proceeded to hug Anton, which showed Anton not being a hugging person. The hugging turned into an intensely quiet wrestling match between the two. When Larrikin was in a chokehold, he pulled out a very crushed bun that he had been hiding for three days and put a candle in it, saying that it was Anton's cake. It was the only time that they had seen Anton smile while on a mission.
Larrikin died in Wales on a later mission, when he took a blast from Serpine's red hand. The beam of necromancer energy was intended for Dexter Vex but Larrikin had pushed Vex aside and saved him. However he died painfully.