1. Macbeth: Throughout the play, Lennox expresses concern and disapproval of Macbeth's actions. After the murder of King Duncan, Lennox initially supports Macbeth but becomes increasingly skeptical and critical of his reign. He questions Macbeth's morality and sees his descent into tyranny and paranoia. Lennox becomes part of the group of nobles who eventually rebel against Macbeth and work towards restoring order to Scotland.
2. Fleance: Lennox does not have much direct interaction with Fleance, the son of Banquo. However, he acknowledges Fleance's importance as a potential threat to Macbeth's power. After Banquo's murder, Lennox realizes that Fleance has escaped and expresses concern about the consequences. He understands that Fleance's survival may pose a challenge to Macbeth's ambitions.
3. Duncan's Sons: Lennox shows loyalty and respect for Duncan's sons, Malcolm and Donalbain. He recognizes them as the legitimate heirs to the Scottish throne and supports their claim to the crown. Lennox remains faithful to Duncan's family even after Macbeth's ascension and actively participates in the efforts to overthrow him.
Overall, Lennox's opinions of Macbeth, Fleance, and Duncan's sons are shaped by his commitment to justice, honor, and loyalty. He becomes a vocal critic of Macbeth's tyranny, acknowledges Fleance's significance as a potential threat to Macbeth, and supports Duncan's sons in their pursuit of the throne.