The Locker Puzzle in Silent Hill f is one of the standout challenges during the Ebisugaoka Middle School section. What looks like a simple locked door quickly turns into a multi-step puzzle where you must decipher a code invented by the students themselves. This “girl code” is the heart of the challenge, and cracking it is essential for progressing through the game.

How to Reach Ayumi’s Locker
You first encounter the puzzle after solving the Secret Box and gaining access to the Old Annex. Inside, you’ll find several notes that introduce the concept of the students’ “girl code”—a cipher where letters are swapped with numbers or symbols that look like them.
Eventually, you’ll discover that Ayumi’s locker is the key to progressing. She left an important item in there, but to unlock it, you must translate her encoded clue from Asakura’s Textbook using girl code.
How Girl Code Works in Silent Hill f
Girl code is essentially a proto-leetspeak system where characters are replaced with numbers or symbols:
- 1 = I
- 3 = E
- 4 = A
- 5 = S
- 8 = B
- 0 = O
- 6 = U
- + = T
By applying this cipher, you can turn the words hidden in Ayumi’s notes into a three-digit code that works on the locker padlock.
Ayumi’s Locker Code by Difficulty
The required solution changes depending on puzzle difficulty. Here’s the breakdown:
Story Mode
- Textbook Clue: “I’m a mermaid… The sea is calling out to me.”
- Key Word: SEA
- Code: 534
Hard Mode
- Textbook Clue: “I’m a tortoise… The bus is calling out to me.”
- Key Word: BUS
- Code: 865
Lost in the Fog Mode
- Textbook Clue: “You can poach it, fry it, and even boil it… mix with flour and sugar to make cake.”
- Key Word: EGG
- Code: 399
Opening Ayumi’s locker gives you the Key Cabinet Key, which in turn unlocks the Back Mountains Key in the faculty office—allowing you to continue the story.
Optional Lockers and Their Rewards
While only Ayumi’s locker is mandatory, three other lockers can also be opened for useful rewards. Their codes remain the same across all difficulties:
- Aoi Takeshi’s Locker – Code: 401
- Based on his own name in girl code.
- Reward: An Origami of Grievances (clue for Suga’s locker).
- Suga Yosie’s Locker – Code: 505
- Hinted as “a cry for help” (SOS).
- Reward: A School Bag that expands your inventory by +1. In NG+, this changes to a Shriveled Abura-age offering.
- Tsuchiya Taiko’s Locker – Code: 377
- Revealed in an Origami of Grievances.
- Reward: Omamori [Wolf], increasing your combat effectiveness. In NG+, replaced with a Dried Carcass.
Why You Shouldn’t Skip the Locker Puzzle
The Locker Puzzle does more than block progress—it teaches players how to read the game’s unique cipher. Girl code reappears in other puzzles and notes, so learning it here helps you throughout the rest of the school chapter.
Additionally, grabbing the optional rewards before leaving is highly recommended. The extra inventory slot and the Omamori can make a real difference in the more combat-heavy encounters that follow.
Related Guides You Might Like:
- Silent Hill f Scarecrow Field Puzzle Solution Guide
- Silent Hill f Shrine Altar Puzzle Solution Guide
- Megabonk All Characters: How to Unlock Every Playable Character
- How to Solve the Silent Hill f Light Puzzle in the Worship Hall
- Silent Hill f Game Length: How Long to Beat & Endings
- Best Settings for Silent Hill f on PC to Boost Performance
- All Silent Hill f Hinako Costumes and Outfits
- How to Heal and Restore Sanity in Silent Hill f | Full Survival Guide
- Silent Hill f Consumables Guide: All Items and Effects
- Silent Hill f New Game Plus: Unlockables, Endings & Weapons
- Shimizu Residence Silent Hill f: All Puzzles, Crests & Boss Guide
- Silent Hill f All Endings List: How to Unlock All 5 Endings
- Silent Hill f Sacred Sword Guide – How to Find All Jizo Statues and Offerings
- Silent Hill f Middle School Locker Puzzle – All Codes & Rewards
- How to Solve Shrine Vault Puzzle Silent Hill f (All Difficulties)
- Silent Hill f Memories Puzzle: Shu’s Possessions Locations
Quick Tips: Silent Hill f Locker Puzzle Solution
- Always check the Annex classrooms carefully—most cipher notes and Origami of Grievances are hidden there.
- Remember that only Ayumi’s locker changes per difficulty; the rest stay constant.
- Optional lockers may seem unnecessary, but their rewards are among the best upgrades available at this stage.
By following these steps, you’ll crack the code, unlock all the lockers, and walk out of Ebisugaoka Middle School fully prepared for what Silent Hill f has waiting outside. Play Now!