Persona 5 Royal Mementos Complete Guide — Maze Structure, Color Shifts, Jose’s Trades, and the Reaper#
Mementos is the collective unconscious maze formed from the distorted desires of everyone in Tokyo, and it is the “underworld” projected by the Phantom Thieves each time they change someone’s heart. For players, it is the home turf for grinding experience and money: the deeper the path, the stronger the Shadows and the richer the rewards; at the same time, nearly every Request’s target Shadow dwells in its corners, so everyday infiltrations and story progression stay intertwined.
Royal deepened this maze in breadth, adding randomly generated Deviant Palaces and the Deviation mechanic, plus a Stamp Rally collection loop centered on the mysterious boy Jose. Below we first break down the maze’s structure and color-shift rules, then cover Jose’s trade systems and how to handle the Reaper.
Core Mechanics at a Glance#
| Item | Details |
|---|---|
| Unlock timing | Opens in May, alongside the Request system |
| Entrance | Shibuya underground walkway; take the subway between the surface and the maze |
| Structure | Regenerated on every infiltration; the official side has never published a total floor count |
| How it expands | Paths open layer by layer with story progress; the more hearts changed, the deeper you can reach |
| Role | The home turf for grinding experience and money, while also hosting Request target hunts |
| Royal additions | Deviant Palaces, Deviations, the Stamp Rally, and Jose’s trade system |
Structure: A Maze That Rearranges Every Run#
Mementos is, by design, a maze that constantly reorganizes itself: each time you descend, the forks, chests, and Shadow placements regenerate. That means “memorizing the map” is pointless — the only reusable knowledge is the rules themselves: which areas yield what, and which signals mean danger. The official side has never published Mementos’ total floor count, and any circulating “X floors total” claim has no basis; this site offers no such numbers either.
The maze chains together multiple “paths,” each holding forks, chests, and wandering Shadows, and each path ends in a Safe Zone: Shadows cannot attack there, and you can rest freely, save, and load. On deep runs, treating Safe Zones as forward anchors is a basic skill for lowering the odds of a wipe.
As the story advances and the Thieves change more hearts, Mementos’ cognitive structure loosens bit by bit, opening deeper paths. In other words, the maze’s “depth progress bar” is the story itself — there is no separate switch to hunt for.
Color Shifts: Gold, Blue, and Red Stages#
Mementos shifts its overall color as you progress: from a golden tone to blue, then to red. The deeper the color, the stronger the Shadows inside and the better the drop quality. This shift is bound to story pacing; the official side has published no precise timetable of thresholds, and there is no deterministic rule like “turns red X minutes after entry.”
| Stage | Appearance | Effect on exploration |
|---|---|---|
| Early | Golden tone | Mild Shadows; good for leveling, flower and stamp collecting |
| Mid | Blue tone | Stronger Shadows, better drops, supply pressure starts to show |
| Deep | Red tone | High-powered Shadows cluster here, best drops, and the highest-risk zone for Reaper activity |
The practical takeaway is simple: for leveling and collecting, linger in the gold and blue stages; for rewards, follow the story and treat the red stage as your delivery window, but confirm team level and supplies before pushing deep.
Deviant Palaces and Deviations (Royal Additions)#
Royal added two new spatial forms to Mementos. Deviant Palaces are mini palace-like zones that appear on some paths, with their own layout and boss — effectively compressing the main Palace infiltration loop inside the maze. Deviations are maze anomalies you may hit while exploring, injecting unexpected changes into an established route.
Both mechanics have trophies that cross-confirm them: encountering a Deviation unlocks “The Deviated Cognition,” while “The Search for Power” — a silver trophy — requires completely changing Mementos’ cognition. In other words, the mere existence of these two trophies proves that Deviant Palaces and Deviations are not decorative content but the core additions to Royal’s Mementos.
Jose and the Stamp Rally#
Jose is a new Royal character who rides a small cart through Mementos, claiming to be researching the maze. The Stamp Rally centered on him is the game’s flagship collection loop, with three trade lines:
| Trade line | Delivered item | Content | Related trophy |
|---|---|---|---|
| Stamp trades | Stamps | Collect stamps scattered across Mementos and exchange them for permanent buffs that apply inside the maze; tiers and magnitudes follow the in-game descriptions | “The Phantom Philatelist” |
| Flower trades | Flowers | Hand flowers picked up while exploring to Jose; accumulated deliveries earn his gifts | “Jose’s Favorite Customer” |
| Will Seed refinement | Will Seeds | Hand the Will Seed crystals collected from each Palace to Jose to refine them into accessories | No dedicated trophy |
Stamps and flowers are two parallel currencies with separate pickup methods and delivery targets — collect both in passing while exploring. The two trophies’ names — “The Phantom Philatelist” and “Jose’s Favorite Customer” — directly confirm this: they map to the stamp line and the flower line respectively, and either alone is not enough.
The most special Will Seed refinement involves Maruki’s Palace crystals. Maruki’s Palace concludes the story immediately upon completion, leaving no chance to hand its Will Seed crystals to Jose that playthrough — those crystals can only be carried into the next playthrough and exchanged for accessories. This is one of the most easily missed steps in whole-run planning: players going for the Platinum should consciously collect Maruki’s Palace Will Seeds before entering the third semester and treat them as an item on their New Game+ checklist.
Shadows and the Reaper#
Wandering Shadows are the main source of experience and money. Using the extra-turn window after weakness hits, Baton Pass, and ailment combos for Technical bonuses clears packs efficiently; for the exact rules, see the Combat System page.
The one enemy demanding special treatment is the Reaper — the powerhouse roaming Mementos’ deepest reaches. On its spawn mechanic, the official side has given only a qualitative statement: it relates to accumulated damage and defilement of Mementos, with no exact trigger formula published. So there is no stable farming method like “appears on floor X” or “spawn chance per run”; the only actionable experience is: don’t linger long in deep areas, and when you spot quicksand-like floor textures or hear strange sounds, first decide whether to fight or flee.
Defeating the Reaper unlocks the silver trophy “Unsurpassed Rebel,” which matches the achievement page’s record of “defeat the Reaper.” Its drops are top quality, making it a worthwhile late-game hunt.
Reaper Battle Preparation Checklist#
| Preparation item | Key points |
|---|---|
| Team level | Don’t pick a fight underleveled; first level the team on ordinary Shadows in deeper paths |
| Recovery and supplies | Carry top-tier recovery items and SP supplies; the fight may run many turns |
| Elemental handling | Weakness-hitting strategies don’t work on the Reaper; gains come from buffs, debuffs, and Baton Pass tempo |
| Retreat plan | If the team is in poor shape, use checkpoints to withdraw first — never force a slugfest |
Requests and Efficient Exploration#
Most Requests point to target Shadows inside Mementos, with varied rewards. For the full Request list and target locations, see the Requests page. The advice below draws entirely on the maze’s own rules, with no reliance on random information:
| Advice | Basis |
|---|---|
| Bank multiple Requests, then dive once | Every descent runs the full path loop; batching spreads out preparation costs |
| Push to the deepest reachable level first, then clean up on the way back | Deeper paths pay more; minimize fights on the way down and harvest on the return |
| Use checkpoints to return straight to the entrance | Infiltration progress is not lost by fast-traveling back |
| Assess team condition before pushing deeper after the color darkens | Deeper colors mean stronger Shadows, and risk spikes when supplies run low |
| Pick up flowers and stamps in passing | Both depend on distance moved inside the maze; dedicated collection trips are inefficient |
Common Misconceptions#
- “Mementos has 20 floors / 30 paths” — the official side has never published a total floor count; the layout regenerates each time, so any fixed floor count is untenable.
- “Turns red X minutes after entry” — the color shift tracks progress, and no precise thresholds were published; there is no minute-based timetable.
- “The Reaper appears on floor X with Y% chance” — the official side has given only a qualitative spawn condition; any formulaic claim is fabrication.
- “Each path has a fixed number of chests and stamps” — both change with each regenerated layout; no per-floor fixed list exists.
Related Pages in This Section#
- Requests: target Shadow list and rewards at a glance.
- Combat System: full Baton Pass and Technical rules — the foundation for the Reaper fight.
- Achievements & Trophies: every trophy and achievement mentioned here.
- Collectibles: complete lists of Will Seeds and each Palace’s collectibles.
- Endings Guide: third-semester and true-ending date gates, plus the background on Maruki’s leftover Will Seeds.
- Enemy Database: the Shadow varieties roaming Mementos.