Nami in Ba Country represents the side of justice, while Michael is the faction of evil. The clash between justice and evil naturally breeds hate and intent to kill. Naturally, Nami calls Michael and his group rebels, but Michael and others don't think so. The rebels regard themselves as the legitimate force, aiming to kill Kasam and become the masters of Ba Country.
To achieve their goals, the rebels have committed numerous crimes, using all means possible, and Nami naturally hates them to the core.
Given such a relationship, the encounter between Nami and Michael naturally brims with murderous intent.
Michael is one of the main leaders within the rebels. If he were an ordinary minor character, Nami wouldn't possibly know him.
