He abandoned her son Sean, but he did it for her own good. However, Sean hates him for it and now Liam is haunted by guilt. In the past he worked as a professional assassin and has killed a large number of people. He's not proud of that. He can be quite cruel at times, but he has no malice. He just likes to speak frankly. He is quite serious and calm, but has little patience and a rather dangerous dark side. He is quite a lone wolf, deep down he longs for company. He lost his wife.