Final Fantasy Resonance Boss Guide: Every Boss Weakness, Best Vision & Team (2026)

Every boss in Final Fantasy Resonance (FF Resonance) is beaten the same way: find its weakness, bring the Vision that carries that element, and drain the stagger gauge before it acts. This guide has all of it in one place: the weakness and resistance of every story boss, esper and major optional fight, plus the best Vision to bring for each one, matched to the chapter it unlocks in so you only see picks you can actually equip.

Updated October 30, 2026 for the launch version. Weaknesses are cross-checked across the fan databases that have compiled them from the full game (ffresonance.wiki, Game8 and MeowDB), since Square Enix hasn't published them. Where those sources disagree, the table says so.

How to beat any boss in Final Fantasy Resonance

Hit the weakness, stagger, then spend the bonus phase. Every boss has a stagger gauge under its HP bar, weakness hits drain it faster, and a staggered boss loses its turn and its defense. The best Vision for a fight is the one that brings the boss's weakness without also bringing an element it absorbs.

1. Check the weakness first. Use the table below, or cast Libra on anything new. Some bosses change weakness mid-fight (Archaeoaevis, Ultima Weapon, Sephiroth).
2. Equip for the element, not the name. A Vision brings several elements, so pick the skills that hit the weakness and leave the rest unused. Warrior of Light against Liquid Thunder means his Earth skills, not his Lightning ones.
3. Keep a healer in. Leah on Fina covers almost every story fight. Drop her only for a fight you can stagger fast.
4. Fill elemental gaps with an esper. If your party can't reach a weakness, an esper brings it for three turns.

Final Fantasy Resonance boss weaknesses: every story boss

Here is every main-story boss in order, with the best Vision to bring. The Vision picks only use Visions that are unlocked by that chapter (unlock chapters are in our FF Resonance builds guide). Sephiroth is optional, but he's the fight most players are stuck on, so he's first.

Boss	Chapter · location	Lv	Weak to	Resists / immune / absorbs	Best Vision to bring
Sephiroth (optional)	Ch. 5+ · Whirlpool Hollow	45	Changes by phase: none, then the Infusion counter-element, then Light	Immune to most ailments; absorbs Dark in the last phase	Warrior of Light, Leah, Tronn, Terra · full guide
Belmodar	Ch. 1 · Earth Shrine	4	Fire, Dark	Resists Lightning	Tronn or Terra (Ch. 1)
Hell's Rider	Ch. 1 · Grandshelt castle	6	Ice, Light	—	Tronn (Ice) + Warrior of Light (Light)
The Hunger	Ch. 1 · Kolobos Ruins	9–10	Form 1: Ice. Form 2: Light	—	Tronn, then Warrior of Light
Siren (esper)	Ch. 1 · Siren's Tower	11	Lightning	Resists Water	Warrior of Light or Tronn (Ch. 1)
Liquid Thunder	Ch. 2 · Mt. Thunderclap	13	Earth	Immune to Lightning	Warrior of Light, Earth skills only
Mom Bomb	Ch. 2 · Dwarven Forge	14	Water	Resists Fire	Cloud or Terra (Ch. 1)
Epimetheus	Ch. 2 · Mobliz Shipyard	16	Lightning	—	Cloud, Tronn or Warrior of Light
Adrastea	Ch. 2 · Mobliz Shipyard	16	Lightning, Water	—	Cloud (both elements)
Aether	Ch. 2 · Wind Shrine	18	Ice	Immune to Wind	Tronn, Terra or Noctis (Ch. 2)
Wave Lopros	Ch. 3 · Cave of Waters	20	Ice	—	Tronn, Terra or Noctis
Water Dragon	Ch. 3 · Olderion	21	Lightning	Resists Water	Firion (Ch. 3), Tronn or Warrior of Light
Leviathan (esper)	Ch. 3 · Lake Dorr	23	Lightning	Resists Water	Firion, Tronn or Warrior of Light
Alluvion	Ch. 3 · Water Shrine	26	Lightning	Immune to Water	Firion or Warrior of Light
Ignis	Ch. 4 · Weapons Factory	27	Water	Resists or absorbs Fire (sources differ)	Cloud or Shantotto (Ch. 4); keep Fire off
Emperor of Zoldaad	Ch. 4 · Zoldaad Castle	30	Water	—	Cloud or Shantotto
Lazarov	Ch. 4 · Zoldaad Castle	30	Earth	—	Warrior of Light
Test Subject No. 9	Ch. 4	31	Water	Resists Fire	Cloud or Shantotto
The Hunger (rematch)	Ch. 4	31	Fire, Light	—	Tronn + Warrior of Light or Cecil
No. 999	Ch. 4	32	Wind	—	Firion or Y'shtola (Ch. 4)
Slagworm	Ch. 5 · Village of Sunioo	33	Wind	Immune to Earth	Firion or Bartz (Ch. 5), Wind skills
Iron Giant	Ch. 5 · Nameless Ruins	34	Lightning	—	Cloud or Bartz
Liquid Flame	Ch. 5 · Nameless Ruins	34	Ice, Water	Absorbs Fire	Cloud or Y'shtola; no Fire
Byblos	Ch. 5 · Arcane Library	36	Fire, Dark	—	Terra or Tronn + Victoria (Ch. 5)
Archwitch Fina	Ch. 5 · Fina's Psyche	38	Light, Water	Resists Dark	Warrior of Light + Cloud
Tellus	Ch. 5 · Tower of Mysidia	39	Wind	Resists Earth	Firion or Victoria
Lux	Ch. 6 · Rugged Mountain Path	41	Dark	Resists Light	Victoria or Cecil
Elfdrit	Ch. 6 · Gronoa Shrine	42	Fire, Light	Resists Dark	Clive (Ch. 5) or Tronn + Warrior of Light
Archaeoaevis	Ch. 6 · Sanctissimus Shrine	40	Wind (changes after Barrier Shift)	—	Firion; Libra after every shift
Dad Bomb	Ch. 6 · Sanctissimus Shrine	40	Fire	Resists Ice	Clive or Terra
Test Rider	Ch. 6 · Sanctissimus Shrine	40	Earth, Light	—	Warrior of Light (both elements)
Yakhanati	Ch. 6 · Sanctissimus Shrine	40	Wind, Dark	—	Victoria (both elements)
Arch Gargoyle ×2	Ch. 6 · Sanctissimus Shrine	40	Wind, Light	—	Firion (both elements)
Dragon	Ch. 6 · Sanctissimus Shrine	42	Lightning	—	Bartz, Firion or Cloud
Gelidus	Ch. 6 · Sanctissimus Shrine	43	Fire	Resists Ice	Clive or Terra
Aether (rematch)	Ch. 7	46	Ice	Immune to Wind	Noctis or Tronn
Ignis (rematch)	Ch. 7	47	Water	Resists Fire	Cloud or Camille (Ch. 5)
Alluvion (rematch)	Ch. 7	48	Lightning	Immune to Water	Bartz or Firion
Tellus (rematch)	Ch. 7	49	Wind	Resists Earth	Firion or Victoria
Umbra	Ch. 7	50	Light	Resists Dark	Warrior of Light or Noctis
Dante	Ch. 8	50	Earth, Light	—	Warrior of Light
Behemoth	Ch. 8	52	Wind, Light	Resists Earth	Firion
Dark Bahamut	Ch. 8	52	Light	—	Warrior of Light, Noctis or Firion
Sol	Ch. 8	52–55	Dark	—	Victoria or Cecil
The Keen of Fury	Ch. 8	53	Earth	—	Warrior of Light or Bartz
Left Hand / Right Hand	Ch. 8	55	Left: Wind. Right: Earth	—	Bartz (Wind and Earth)
Chaotic Darkness (final boss)	Ch. 8	55	Light	Immune to Dark	Warrior of Light + Leah; bench Dark damage

Sources: weaknesses and levels from ffresonance.wiki, Game8 and MeowDB, which agree on every Chapter 1–6 weakness; Chapters 7–8 rest on ffresonance.wiki and MeowDB. Game8 doesn't list resistances. Locations for the Chapter 7–8 rematches and the final dungeon aren't confirmed by more than one source, so they're left out.

---

Want the next update the day it lands? Subscribe to Geeky Inc: free, no spam, just JRPG guides worth reading.

---

Esper trials: weaknesses and how to win

Espers are recruited by beating them, and each one is a stagger check with a gimmick. Shiva and Ifrit are the two that wipe parties, so they get their own notes below.

Esper	Where	Lv	HP	Weak to	Resists / immune
Siren	Ch. 1 story · Siren's Tower	11	20,000	Lightning	Resists Water
Ramuh	Ch. 2 optional · Mt. Thunderclap	20	24,000	Earth	Immune to Lightning
Leviathan	Ch. 3 story · Lake Dorr	23	40,000	Lightning	Resists Water
Titan	Ch. 4 optional · overworld	30	65,000	Wind	Immune to Earth
Ifrit	Ch. 5 optional	33	96,000	Water	Immune to Fire
Shiva	Ch. 5 optional · Mysidia	35	115,000	Fire	Resists Water, absorbs Ice
Odin's Shadow	Ch. 6 side quest · Bladerain Stele	45	175,000	Lightning	—
Bahamut	Ch. 7 · airship	50	200,000	None	Stores elemental attacks

Ifrit: stop the Fury

Ifrit is weak to Water and immune to Fire. After his sixth hit he enters Fury (+40% attack and magic, −40% defense and spirit). Three Water hits end it; anything else during Fury triggers Fira Barrage three times. Bring Cloud or Shantotto for Water, keep Fire off the party, and stagger him to cancel Fira Barrage and Scorched Earth. Fire Sprite Earrings halve Fire damage (per ffresonance.wiki's Ifrit guide).

Shiva: control the elementals

Shiva is weak to Fire, resists Water and absorbs Ice, so anyone on Tronn or Terra has to stick to Fire skills. She summons ice elementals (weak to Fire, immune to Ice) that explode on their third action, and every third explosion sets off Blizzaga Barrage. Kill the elementals before they act. Clive is the cleanest Fire Vision here because he brings no Ice. A Tiara of Frost halves Ice damage.

Odin's Shadow and Bahamut

Odin's Shadow (175,000 HP) is weak to Lightning, so Bartz, Cloud or Firion all work. When he uses Concentrate, a death countdown starts that ends in Zantetsuken: stagger him before it lands. Bahamut has no weakness and stores the elemental attacks you throw at him, so build for raw damage and stagger, and be ready for Megaflare when his countdown hits zero.

The hardest fights: team and strategy

Sephiroth (Whirlpool Hollow)

Level 45 at minimum, 250,000 HP, and three phases. Go physical in phase one, but switch to magic while he's in Masamune in Waiting, which counters physical attacks. Then match each of his four Infusions to its counter-element (Fire → Water, Ice → Fire, Lightning → Earth, Wind → Ice), and finish with Light while he absorbs Dark. Our party is Rain (Warrior of Light), Fina (Leah), Nichol (Tronn) and Sakura (Terra). The full phase-by-phase plan is in our Sephiroth boss guide.

Archwitch Fina (Chapter 5)

100,000 HP, weak to Light and Water, and she resists Dark. She uses Doom and Death, so equip a Ribbon if you have one and keep a reviver ready. Lead with Warrior of Light for Light and Cloud for Water.

Gelidus (Chapter 6)

200,000 HP and the longest fight of the Sanctissimus Shrine run. He's weak to Fire and resists Ice, so put your casters on Fire (Clive or Terra) and save your Sweeping Stagger for a burn window rather than spending it early.

Chaotic Darkness (final boss)

Weak to Light and immune to Dark. Warrior of Light and Noctis both bring Light, and Leah keeps the party up through Ray of Apocalypse. Bench anyone whose damage is mostly Dark for this one. Sources disagree on whether the second form's weakness changes, so cast Libra when it transforms.

Optional and endgame bosses

Boss	Where	Lv	Weak to	Notes
Poison Flora	Ch. 1 side quest	7	Fire, Wind	—
Imposter Soldier	Ch. 1 side quest	10	Ice, Dark	Inflicts Paralysis
Blood Dragon	Ch. 3 side quest	28	Fire	Resists Ice
Phantom Train (true form)	Ch. 5 side quest	32	Ice, Light	Doom countdown
Typhon	Ch. 5 · airship	35	Ice	Resists Wind; Snort ejects a party member
Intangir	Endgame	52	Earth, Light, Dark	Absorbs Fire, Ice, Wind, Lightning and Water
Rogue Magitek Weapon	Endgame	63	Lightning, Water	Resists Fire, Ice, Wind, Earth; immune to Dark
Ultima Weapon	Endgame	70	Changes by form (Libra each form)	Stagger 5,000
Shinryu	Endgame	95	None	Resists Light, absorbs Water
Omega	Endgame	99	Lightning	Stagger 15,000

Intangir is the trap here: it absorbs five elements, so a party built for the story will heal it. Bring Cecil (Light and Dark) and Earth skills only. Omega has a 15,000 stagger gauge, so plan for a long fight even though Lightning hits it.

Final Fantasy Resonance bosses: FAQ

What is the hardest boss in Final Fantasy Resonance?

Among the story-reachable fights, Sephiroth in Whirlpool Hollow: 250,000 HP, three phases and four rotating Infusions. In the endgame, Omega (level 99) and Shinryu (level 95) are tougher still.

What level should I be for each boss in FF Resonance?

Match the boss's level in the tables above. Story bosses run from level 4 (Belmodar) to level 55 (Chaotic Darkness), the espers from 11 (Siren) to 50 (Bahamut), and the endgame tops out at Omega (level 99). If a fight goes badly at the listed level, fix the elements before you grind: a party that hits the weakness can usually win a few levels under.

What is the best Vision for boss fights?

The one that brings the boss's weakness. Over a whole playthrough, Warrior of Light (Lightning, Earth, Light) and Tronn (Fire, Ice, Lightning) cover the most early bosses, and Bartz and Firion take over Wind and Lightning from Chapter 5. Our best Vision for each character guide shows who should wear them.

How do I find a boss's weakness?

Cast Libra, or check the table above. Weakness hits drain the stagger gauge faster, which is how every fight is won.

The bottom line

Bring the element, not the strongest Vision. Most boss walls in Final Fantasy Resonance come from a party that can't reach the weakness. Use the table, swap one Vision, and the stagger loop does the rest. For who to build first, see our FF Resonance character tier list, and for Vision rankings, the Visions tier list.

We're adding to this hub as the endgame fights get mapped. Subscribe to Geeky Inc to get the update the day it lands.