Who is Edmund Plantagenet from The Reckoning and what is their importance?

Edmund Plantagent is King Edward's kinder brother. He often serves as Edward's conscience, but his influence is limited. He supports his brother and will do anything his brother asks of him. Unlike Edward however, Edmund cares about those around him. He genuinely likes Ellen, questions Edward about why he is holding her so long. Edmund argues on Amaury's behalf to the king and expresses regret when he hears of Llewelyn's death. Edward has no regrets believing that those who challenge him get what they deserve. Edmund attempts to make Edward see the other side of the argument, but Edward is blind to the plight of his enemies, unable to see the grievances they have suffered that have forced rebellion.