Macduff
is horrified by Duncan's murder, he is a Thane like Lennox and
Rosse but he is honourable and decent.
Macduff tells Malcolm of the worry and confusion, and helps
him to amass an army to challenge Macbeth.
However, his big mistake is in leaving his wife and kids alone
in Scotland. He is stricken with grief when he finds out that
they have been murdered, and gets his revenge during battle.
Macduff
is horrified by Duncan's murder, he is a Thane like Lennox and
Rosse but he is honourable and decent.