Othello's trusted lieutenant whom Iago targets out of ambition. Iago manipulates events to cause Cassio's disgrace and replace him. Desdemona advocates for his reinstatement, an act that Iago uses as fuel to plant seeds of jealousy in Othello's mind.
A bitter professional and personal rival seeking to usurp Cassio's position.
A military commander and his highly trusted subordinate officer.
A compassionate ally who actively pleads for the disgraced officer.
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