A Sors — or, a semi-divine being of fortune, wealth and luck — makes Tobias long lasting but fragile. His good luck keeps him alive and he is immortal only so much as he cannot die from natural causes. For this reason, he and Theo became very good friends, with Theo protecting him and Tobias always helping the young immortal find safety around. They are the same age, oddly enough, but met in Seoul in the late 80s. He now runs his own Private Equity Firm.