Who are Malcolm and Donalbain?

Malcolm is said to be a contrast to his father Duncan. He is cautious while his father is believing and unsuspecting. This he might have learnt through his experiences. He runs away to England to keep himself safe. But he does not gifted with good sensibilities. While marching to Dunsinane he focuses ahead to victory. Even with his supporters he has an eye, is led to suspect the supporters with some motive rather than seeking of rewards.

Malcolm and Donalbain are King Duncan's sons and the rightful heirs to the Scottish throne. Immediately following their father's assassination, Malcolm and Donalbain decide to flee Scotland in order to avoid the same fate as their father. In act 2, scene 3, the two brothers have a private conversation regarding their father's death, and Malcolm decides to flee to England while Donalbain travels to Ireland. While Donalbain is not mentioned again in the play, Malcolm takes the leading role in defeating Macbeth and retaking the Scottish throne. In England, Malcolm becomes allies with King Edward and teams up with Siward and Macduff to defeat Macbeth. At the end of the play, Macduff ends up decapitating Macbeth and Malcolm is restored to his rightful position as King of Scotland. Unlike Macbeth, Malcolm is a just, benevolent king like his deceased father.