List of Halo characters

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Major recurring characters of the Halo multimedia franchise are organized below by their respective affiliations within the series' fictional universe. The franchise's central story revolves around conflict between humanity under the auspices of the United Nations Space Command or UNSC, and an alien alliance known as the Covenant. The artifacts left behind by an ancient race known as the Forerunner play a central role—particularly the ringworlds known as Halos, built to contain the threat of the parasitic Flood.

The characters underwent major changes over the course of the first Halo game's development, and were continually refined or changed with the advance of graphics and animation technologies. Halo's commercial and critical success has led to large amounts of merchandise featuring the franchise's characters to be produced. The Master Chief, the most visible symbol of the series, has been heavily marketed, with the character's visage appearing on soda bottles, T-shirts, and Xbox controllers. Other merchandise produced includes several sets of action figures. The franchise's characters have received varying reception, with some praised as among the best in gaming, while others have been called cliched or boring.