
Artwork from Final Fantasy III.
Armor forged for swordsmen who have mastered every technique and achieved knighthood's most exalted rank.
Onion Armor (オニオンアーマー, Onion Āmā?), also known as Onion, is a recurring piece of armor in the series. It is usually the strongest armor piece in terms of defense, being extremely rare and hard to find.
Appearances
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Final Fantasy III
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Onion Armor is the strongest armor that can only be dropped from Red Dragon. It can be equipped by Onion Knights.
In the NES version, it provides 48 Defense, 48 Magic Defense, and 48% Evade. In the 3D versions, it provides 60 Defense, 40 Magic Defense, and +5 Strength and Vitality.
Final Fantasy IV
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Onion Armor is the strongest armor in the 3D remakes, though the Adamant Armor provides more utility. Onion Armor provides Defense and Magic Defense equal to the user's level, while it also provides Intelligence equal to the user's Current Level/3. It can be obtained by trading in a Black Tail to the Tail Collector, and can be equipped by Cecil, Rydia, Rosa, Kain, and Edge.
Final Fantasy XIV
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Final Fantasy Tactics
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Onion Armor is the strongest armor, obtainable in Rendezvous mode in the War of the Lions version. It provides +250 HP as well as Auto-Regen, Auto-Reraise, Auto-Protect, and Auto-Shell, and can be equipped by the Onion Knight class.
Final Fantasy Type-0
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Increases Defense by 70 and grants Aura.
Onion Armor is an accessory that grants Defense +70 and Auto-Aura. It is the best defense accessory alongside the Crystal Mail. Onion Armor can be bought from SPP Post after completing The Climactic Clash at Azurr mission on Finis difficulty for 20000 SPP. It sells for 10000 gil.
Final Fantasy Crystal Chronicles: Echoes of Time
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Armor that existed within the third final fantasy. For males of all tribes.
Onion Armor is a mid to high-ranked armor that provides 5 Attack, 60 Defense, 5 Magic, 5 Magic Defense, and has two available slots for jewels. It can be equipped by males of all tribes.

Final Fantasy Record Keeper
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Final Fantasy Explorers
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Final Fantasy Brave Exvius
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A set of crimson light armor brought from the Farplane. The distinct, brilliant red color of this armor is a target of admiration of those who call themselves "Onion Knights," who are the only ones that can wear this set of armor. It is as rare as the Onion Helm and Onion Gauntlet, making it difficult to complete, but those who accomplished this feat became so powerful that they remain, to this day, in various records touting their existence.
Onion Armor is a Light Armor obtained during the Final Fantasy III event, Castle Hein. It provides 10 ATK, 40 DEF, and when equipped by Onion Knight, provides HP +15%.
Gallery
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Etymology
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onion, also known as the bulb onion or common onion, is used as a vegetable and is the most widely cultivated species of the genus Allium.
TheThe adjective of onion refers to the Japanese metaphoric idiom of poverty, aptly named the "Onion Life", "peeling away one layer at a time and crying all the way". Alternatively, the term could come from the slang phrase "to know one's onions", meaning to be very versatile.