Who is Julian Delphiki (Bean) from Shadow of the Giant and what is their importance?

Bean is a young man who has been genetically altered as an embryo by a man named Volescu. When Volescu's illegal "experiments" were about to be discovered, a one-year-old Bean hides in the tank of a toilet and escapes the fate of all his experimental siblings, who are destroyed. His genetic alterations leave him brilliant and able to survive on the streets of Rotterdam as a toddler and eventually lead him to Battle School, where he is not only the youngest child accepted but he scores higher than anyone in the history of Battle School.