Story Mode covers the tale of the twin nobles Rowan and Lianna quest to save their kingdom. Heroes are unlocked as they are met and convinced to fight on the player's side. Upon completing this mode a harder difficulty called Lunatic is unlocked. Beginning in Chapter 2, each chapter contains two of Anna's Mementos available for completing side challenges within the battles. The second mementos are only accessible after completing the campaign and playing the stage on hard or lunatic difficulty. One small note: whenever Rowan or Lianna are required on a map, it is always the one the player selected, with the other sibling initially serving as an NPC and later an optional character to field.
| Image | Scenario | Master Seal | Required Units | Unable to Deploy |
|---|---|---|---|---|
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Prologue: Crumbing Peace | No | ||
| Anna's First Memento: N/A
Anna's Second Memento: N/A | ||||
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Chapter 1: Home in Ruins | No | ||
| Anna's First Memento: N/A
Anna's Second Memento: N/A | ||||
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Chapter 2: Woodlands Encounter | No | Rowan or Lianna | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Reach Frederick within five minutes | ||||
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Chapter 3: Dragon Valley Temple | No | Rowan or Lianna and Chrom | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Rescue Curate without Robin's or Cordelia's HP falling below 50% | ||||
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Chapter 4: Hero-King of the Desert | No | Rowan or Lianna and Chrom | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Seize all other enemy forts before seizing the Arena entrance | ||||
|
Chapter 5: The Dragon's Table | Yes | Rowan or Lianna | Chrom |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Defeat Validar before Robin is knocked out and without Chrom's health falling below 60% | ||||
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Chapter 6: Hoshidan Princess | No | Rowan or Lianna | Rowan or Lianna* and Lissa |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Reach Hinoka before any Sky Knights infiltrate your base | ||||
|
Chapter 7: Hoshidan Prince | No | Rowan and Lianna* | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Defeat Oboro before any Samurai reach her** | ||||
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Chapter 8: High Prince Ryoma | Yes | Rowan or Lianna | Rowan or Lianna* and Lissa |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Control eight or more allied forts within 10 minutes | ||||
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Chapter 9: Nohrian Princess | No | Rowan or Lianna* and Chrom | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Rescue the Myrmidon without cooling any lava | ||||
|
Chapter 10: Nohrian Prince | No | Rowan or Lianna* and Chrom | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Defeat the Cavalier messenger without Darios's health dropping below 60% | ||||
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Chapter 11: Crown Prince Xander | Yes | Rowan or Lianna* and Chrom | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Defeat three or more of the enemies attacking Xander while two of Xander's Mercenary guards are still alive | ||||
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Chapter 12: An Orchestrated Battle | No | Rowan or Lianna | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Defeat the Archer and Cavalier messenger disturbing the balance between forces | ||||
|
Chapter 13: What Happened to Corrin | Yes | Rowan or Lianna | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Make Iago retreat within five minutes | ||||
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Chapter 14: Sieging the Citadel | No | Rowan or Lianna | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Seize control of all the forts on the way to the Castle Tower without Darios's health falling below 80% | ||||
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Chapter 15: Taking the World Tree | Yes | Rowan or Lianna | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Find the real Gharnef within five minutes of his shadows appearing*** | ||||
|
Chapter 16: The Imprisoned Prince | No | Rowan or Lianna | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Rescue Darios while in control of eight or more allied forts | ||||
|
Chapter 17: Royal Blood | No | Rowan or Lianna | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Stop four Chaos Dragon statues without any of your allies getting injured | ||||
|
Chapter 18: Chaos Dragon's Might | Yes | Rowan or Lianna | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Reduce Darios's health to 50% or less while two or more Dark Crystals remain | ||||
|
Chapter 19: Reclaiming Home | No | Rowan or Lianna | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Defeat all three Outrealm Gatekeepers (reinforcements) within five minutes of their appearance | ||||
|
Chapter 20: Clash at the World Tree | No | Rowan or Lianna | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Defeat the three Mages controlling the Wall of Darkness without any of your allies getting injured | ||||
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Endgame: Chaos Dragon Velezark | No | Rowan or Lianna | |
| Anna's First Memento: defeat 1,000 foes
Anna's Second Memento: Reduce Velezark's HP to 50% or lower within 10 minutes | ||||
- *The sibling shown here is whichever one the player did not choose.
- **The samurai who spawns must still be alive when Oboro is defeated.
- ***Defeating the real Gharnef ends the battle before the second memento can be earned.