Onion Knight

Special thanks to ElCid for his awesome Warrior of Light and Onion Knight artwork for our infographic!

Character Notes & Recommendations

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Summon Board Passive selections:

Numbers listed below refer to the 7 passives to select for each Ultimate Summon Board for the character. Top is 1, bottom is 7.
  • Shiva choose 3 / 4 / 7

  • Odin choose 3 / 6 / 7

  • Bahamut choose 3 / 4 / 6

  • Usuals:

    • Ifrit, Ramuh, Brothers 4 / 5 / 7

    • Leviathan, Pandemonium, Diabolos, Alexander 4 / 5 / 6

  • For more details and help with summons, check Summon Hub!

Additional Weapons

  • Manikin Weapon: Adds S1 & S2 BRV DMG +10%

    • Acquire by finishing Act 2, Chapter 5 and going to Chapter 5.8

    • Acquire through Item Exchange > Power Token Exchange

Sphere Recommendations

NOTE: The sphere letters below are hyperlinked to our Sphere Hub which lists all available spheres sorted by effect!
  • A Spheres - Focus ATK & BRV DMG as usual. Avoid those that boost just a type of damage, since he is mixed kit (like Melee ATK up, won’t help half of his kit). He hits weakness damage consistently, so that’s a viable trigger for your sphere as well.

  • D Sphere - The ATK aura spheres listed at the top are certainly the best (except Wakka’s)

How-To-Play Notes


  • Open up with Blizzard Combo (S1) or Multi-Hit (S2), usually it’s S1 to get the AoE damage flowing but you can S2 for buffs as well. Your EX will be charged right away after that.

  • Blizzard Combo (S1) is tied to his Sage Mode, and is geared toward dealing AoE damage. This mode doesn’t have a speed boost, so is ideal when wanting to maintain his auras to the party.

  • Multi-hit (S2) is tied to his Ninja Mode, and is geared toward dealing single target damage and going fast. There’s no capability in this mode to shave multiple targets at once, so be mindful of that. This mode is also incredibly fast, so he’ll burn through buffs and his own BT/AA effects if you aren’t careful.

    • When shifting from Ninja to Sage, he tends to do an unpredictable turn jump backwards since he’s losing the huge speed boost from his Ninja buff. Similarly, he can jump up the turn order list from Sage to Ninja.

  • His EX is different depending on his current mode. Meteorite (Sage EX) is the only tool outside of LD that he has to shave multiple targets, and is great damage against multiple targets. Blade Torrent is great against single targets, but don’t delay using your EX just to change mode ever. The EX charges incredibly fast so go nuts!

  • Sword & Sorcery (LD) should be used to maintain his special effect primarily, but you can also use it earlier if you need a free use of his Blizzard Enchant All upcoming. When party ice enchant is needed, you should specifically use your free skill uses on AA. Sword & Sorcery can also help push in tight situations as you pull up allies to act right after OK.

  • Spellbook (or Ninjitsue) offer his BT effect which is quite strong and flexible as you can focus on Magic or Physical teams and provide solid party auras. However, in Ninja mode he risks burning through this effect very quickly.

  • Harmonious Light to Clear Dark Clouds (FR and a mouthful) is a simple FR as it asks for:

    • Acting after an allied turn (40%)

    • Ice attacks (20%, 30% for OK himself)

    • Since his FR pulls up allies and enchants ice to everyone, it's very straightforward and comfy 60% on ally turns and 70% on his own.

Removable Passives

(to remove if you run out of CP space)
  • Chain Bonus (one of the most useless passives in the game)

  • Ninja War Tactics (he’s already too fast in this mode, no need to have this one equipped)

  • BRV Attack+ Up (never needed)

  • DEF passives

  • HP Attack+ Ninja Up

  • HP Attack+ Sage Up

Onion Knight FR Synergy Infographic thanks to Cross!