|Species||Human, Echo Stone|
Apparently he was the most knowledgeable of his colleagues, but when they voted on who would imprint their identity on the Echo Stone, they did not choose him as they thought he would talk to much and waste valuable time. He eventually stole the stone and imprinted his own memories on it. The effect remained permanent, as they couldn't erase his imprint from the stone.
Skulduggery and Valkyrie sought out him for information on the Sceptre of the Ancients, where his colleagues' fears about him talking too much were proven to be correct. However, Oisin provided Valkyrie and Skulduggery with a completely accidental hint that the Sceptre could be hidden underground.