Captain could refer to the following:
- Captain (Ground forces) - The highest company-grade officer rank in the UNSC Marine Corps, usually in charge of a Company of Marines.
- Captain (Navy) - A senior officer rating in the UNSC Navy, usually in charge of larger ships.
- Captain (Army) - The highest company-grade officer rank in the UNSC Army, usually in charge of a Company of Soldiers.
- Jiralhanae Captain - The lowest of the Captain ranks, clad in violet armor.
- Jiralhanae Captain Major - The second rank, with typical golden armor.
- Jiralhanae Captain Ultra - The highest Captain rank, defined by cyan armor.
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