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Sun Door 4 found in the Umbral Labyrinth

Memory Doors (記憶の扉) are the Trails in the Sky the 3rd equivalent of optional quests from other games.

Memory Doors are scattered around Phantasma, with each door providing side story episodes in the form of cutscenes, interactive flashbacks, battles, or minigames, providing a reward on completion. Each door has associated requirements presented in form of a riddle. If the party satisfies the requirements, the door can be opened. Some doors instead (or in addition) require an entry battle that must be won to access the content.

The Recluse Cube can teleport to any previously examined door, regardless of whether it was completed or not.

There are 25 doors in total, split into three types:

  • The Moon Doors (月の扉) number 5 and consist of long stories.
  • The Star Doors (星の扉) number 15 and consist of (usually) short stories.
  • The Sun Doors (太陽の扉) number 5 and consist exclusively of minigames.

List of Memory Doors

Moon Doors

# Episode Location Requirements Reward
1 Orbal Gear Project Part 1 First Plane: Jade Corridor Map 1 Tita
Required Battle
Accessory (Sora Item).png Long Barrel EX
3000 mira
Orbal Gear Project Part 2 Part 1
Tita
Agate
Craft (Sora Skill).png Orbal Gear (Tita)
2 Client Second Plane: Grancel Bracer Guild Scherazard Space (Sora Quartz).png Heaven's Eye
4000 mira
3 Descended Wings Third Plane: Silver Road Map 1 Kloe
Key (Sora Item).png Entrance Exam Results
Space (Sora Quartz).png Falcon Eye
6000 mira
4 Departure Fourth Plane: Saint-Croix Forest Map 2 Estelle
Joshua
Time (Sora Quartz).png Memory
8000 mira
5 The Happiness Stone Sixth Plane: Monochrome Schoolhouse - Old Schoolhouse 2nd floor terrace Time (Sora Quartz).png Luck Accessory (Sora Item).png Happiness Stone
12000 mira

Star Doors

# Episode Location Requirements Reward
1 Julia's Day Off Second Plane: Grancel Castle Entrance Julia
Mueller
Earth (Sora Quartz).png Septium Vein
3000 mira
2 The Salt Pale Second Plane: Grancel Cathedral Win over 100 battles Earth (Sora Quartz).png Petrify
3500 mira
3 The Banquet Second Plane: Grancel Castle Garden Terrace Joshua
Kloe
Food Sit Down (Sora Item).png Luxurious Lunch
3500 mira
4 Journey's End Third Plane: Golden Road Map 1 Zin Water (Sora Quartz).png Yin-Yang
4000 mira
5 Swordsmanship Fourth Plane: Balstar Channel Map 4 Anelace Sword (Sora Weapon).png Jinu (win battle)
5000 mira
6 Training, Agate-Style Fourth Plane: Grimsel Fortress 4th Floor Collect 20 Recipes Accessory (Sora Item).png Super Gladiator Headband
100 mira
7 The Epstein Foundation Fifth Plane: Luminous Labyrinth Map 1 Required Battle Fire (Sora Quartz).png Ingenuity 2
7000 mira
8 Return to the Empire Fifth Plane: Luminous Labyrinth 2 Map 1 Olivier
Mueller
Wind (Sora Quartz).png Divine Eye
7000 mira
9 Like a Mother Sixth Plane: The Monochrome Schoolhouse Girls' Dormitory 50000 mira Food Attack (Sora Item).png Bloody Meatballs
100000 mira
10 Gordias-Class Experiment Report Sixth Plane: The Looking Glass 2nd Floor Renne
Required Battle
S Craft (Sora Skill).png Pater-Mater (Renne)[note 1]
10000 mira
11 Phantom Thief B Report Sixth Plane: The Looking Glass 1st Floor Required Battle Accessory (Sora Item).png Phantom Thief's Cape
10000 mira
12 I Accept Your Request Sixth Plane: The Impregnable Fortress Command Center 1st Floor Richard Mirage (Sora Quartz).png Covert
10000 mira
13 Assault on the Imperial Guilds Sixth Plane: The Black Ark Stern 2F Win over 400 battles Armour (Sora Item).png Jagd Armor
10000 mira
14 Phantasmal Blaze Sixth Plane
The Black Ark Sanctuary
All other doors Accessory (Sora Item).png Brilliant Crown
30000 mira
15 Paradise Seventh Plane
Abyss Depths
Renne Mirage (Sora Quartz).png Nothingness

Sun Doors

# Episode Location Requirements Reward
1 Capua's Delivery Service First Plane: Jade Corridor Map 2 Josette Mirage (Sora Quartz).png Detection
S Craft (Sora Skill).png Bobcat (Josette)
3000 mira
2 Legendary Angler Estelle - Chapter 1 Second Plane: Grancel Fisherman's Guild Estelle Food Ingredient (Sora Item).png Seafood Set
5000 mira
Legendary Angler Estelle - Chapter 2 Chapter 1
Estelle
Food To Go (Sora Item).png Plate of Excellence
5000 mira
Legendary Angler Estelle - Chapter 3 Chapter 2
Estelle
Accessory (Sora Item).png Fisherman's Emblem
5000 mira
3 Arena - Normal Second Plane: Grancel Grand Arena Zin Fire (Sora Quartz).png Physical
5000 mira
Arena - Hard Normal Arena
Key (Sora Item).png Tournament Invitation
Water (Sora Quartz).png Spiritual
10000 mira
Arena - Nightmare[note 2] Hard Arena
Key (Sora Item).png Tournament Invitation
Earth (Sora Quartz).png Soul
20000 mira
4 The Casino -Gambler Jack- Fifth Plane: Umbral Labyrinth Map 2 Key (Sora Item).png Destiny Card Food Sit Down (Sora Item).png Tom Yum Goong
5000 mira
The Casino -Gambler Jack- 2 Blackjack Casino Accessory (Sora Item).png Mirage Ring+
10000 mira
5 Campanella's Quiz Game - Normal Sixth Plane: The Black Ark Forecastle 1F All level 5 quartz [note 3] Food Attack (Sora Item).png Septium Bullets
Campanella's Quiz Game - Hard Normal Quiz
All level 5 quartz [note 3]
Food Sit Down (Sora Item).png Enigmatic Stew
Campanella's Quiz Game - Brutal Hard Quiz
All level 5 quartz [note 3]
Wind (Sora Quartz).png Swiftness
Campanella's Quiz Game - Maniac[note 4] Brutal Quiz
All level 5 quartz [note 3]
Time (Sora Quartz).png Time Gem
  1. Pater-Mater is unlocked upon returning to the Hermit's Garden.
  2. Completing the Arena Nightmare mode with Anelace in the party with Sword (Sora Weapon).png Jinu acquired will upgrade the power of her Jinu.
  3. 3.0 3.1 3.2 3.3 All the required quartz must be in the inventory or in the active party's orbments.
  4. Who Wants to Be a Mirannaire? Maniac mode was added in the PSP/PS3 release of The 3rd and was backported into the English PC release.
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