The Mystery of Arpeggio Fault/Resonium
Last updated 2025-09-02
The Mystery of Arpeggio FaultThe Mystery of Arpeggio Fault features unique Resonium that are only usable in the Event and do not award progress in Ray's Research Log.
Agents
Unlocking Agents requires contribution points. Killing enemies in any stage of The Mystery of Arpeggio Fault will earn you 1 contribution point.
You can spend contribution points to increase the number of Agents that can be deployed at the same time, up to a maximum of 3.
| Icon | Name |  Cost |
ATK | HP | Effect |
|---|---|---|---|---|---|
 |
Anby Demara | — | 8 | 25 | Anby has a 20% CRIT Rate, dealing double DMG upon a critical hit. |
 |
Nekomiya Mana | 10 |
12 | 15 | Nekomata generates 100 Gear Coins when attacking. |
 |
Nicole Demara | 20 |
0 | 24 | Nicole's ATK equals 1/100 of the Coin count. |
 |
Corin Wickes | 20 |
20 | 10 | When Corin gains ATK, she'll gain +1 additional ATK. |
 |
Koleda Belobog | 25 |
10 | 12 | When Ben is on-field, Koleda's attacks are guaranteed to be critical hits. |
 |
Ben Bigger | 25 |
2 | 80 | When Koleda is on-field, Ben has a 50% chance to generate an explosive bomb when attacking. |
 |
Caesar King | 30 |
3 | 35 | Caesar has a 50% chance to reflect DMG when hit (taking no DMG and returning the DMG to the enemy). |
 |
Billy Kid | 40 |
30 | 10 | After the Protagonist takes DMG for the first time, Billy's ATK -15. Billy's attack range is 3. |
 |
Anton Ivanov | 50 |
10 | 28 | Anton will continue attacking even after his HP drops to 0, each attack thereafter will cause him to lose 1 ATK. |
 |
Lighter | 50 |
5 | 40 | Lighter's ATK +20 while the Protagonist has less than 20 HP. |
 |
Soldier 11 | 60 |
30 | 60 | Soldier 11's ATK will not increase. |
 |
Tsukishiro Yanagi | 70 |
5 | 22 | Enemies hit by Tsukishiro Yanagi will create a box, making it so that only Yanagi can attack that enemy, and providing EXP equivalent of defeating that enemy everytime she attacks it. |
[Assist]
| Icon | Name | Rank | Effect |
|---|---|---|---|
 |
[Assist] Activity Transfer Device |  |
Immediately obtain 3,000 Coins |
 |
[Assist] Dynamic Calibration Device |  |
Immediately obtain 10 keys |
 |
[Assist] Ether Reaction Device |  |
Immediately generate 4 random Bangboo chips |
 |
[Assist] Hand Operated Generator | |
Immediately obtain 99 keys |
 |
[Assist] Holographic Decoy | |
Immediately obtain 888 Coins |
 |
[Assist] Impact Feedback Device | |
Immediately obtain 5 bombs |
[Deployed]
| Icon | Name | ATK | HP | Effect |
|---|---|---|---|---|
 |
[Deployed] Avocaboo | 2 | 40 | Gains +5 HP when attacking. |
 |
[Deployed] Penguinboo | 5 | 20 | — |
 |
[Deployed] Luckyboo | 3 | 30 | Consumes Gear Coins, gaining +1 ATK for every 3 Coins consumed. |
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[Deployed] Exploreboo | — | — | Consumes key tiles and generates chests. |
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[Deployed] Sumoboo | 20 | 5 | — |
 |
[Deployed] Paperboo | 4 | 20 | Gains +2 ATK for each additional Bangboo. |
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[Deployed] Bagboo | 2 | 20 | Deals 7x DMG when attacking. |
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[Deployed] Sharkboo | 10 | 35 | Does not follow the Protagonist. |
 |
[Deployed] Safety | — | — | Breaks walls and occasionally finds valuable items. |
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[Deployed] Devilboo | — | — | Consumes health recovery tiles and has a high chance to generate ATK tiles. |
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[Deployed] Amillion | 8 | 50 | Will attack the shopkeeper. |
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[Deployed] Golden Bangboo | 0 | 10 | ATK equals 1/100 of Coin count. |
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Deployed Officer Cui [sic] | 20 | 20 | DMG taken by Cui is transferred to the protagonist. |
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[Deployed] Omnom | 4 | 20 | ATK is always equal to 1/5 of its HP. |
[General]
| Icon | Name | Rank | Effect |
|---|---|---|---|
 |
[General] Hero's Cape | |
All squad members' ATK +5. |
 |
[General] Cat Comb | |
The protagonist immediately gains +15 ATK, but for each attack, ATK -1. |
 |
[General] Bag of Salt | |
1 explosive bomb is generated instantly when a monster is killed |
 |
[General] Cleavers | |
When attacking, 20% chance to turn enemies into Ether crystals (no EXP provided) |
 |
[General] Sashimi Knives | |
Upon destroying an Ether crystal, 30% chance to generate an enemy |
 |
[General] Fruit Peeler | |
Doors now open with 1 Coin and no longer consume keys |
 |
[General] Antique Pocket Watch | |
When picking up Coins, there is a 25% chance to generate an Ether crystal. |
 |
[General] Aromatic Candle | |
+100% EXP gained |
 |
[General] Best Man's Bowtie | |
Upon making a purchase, for every 100 Coins spent, Protagonist HP +1 |
 |
[General] Disposable Gloves | |
When the Protagonist takes DMG, deal 1 DMG to all enemies on this floor |
 |
[General] Dog Tags | |
Upon leveling up, generate 5 explosive bombs |
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[General] Heavy Knives | |
Protagonist ATK will remain equal to Gear Coin count/200 and will not be affected by any other effects. (For example, with 400 Gear Coins, ATK will be 2) |
 |
[General] Insecticide | |
When a bomb explodes, 30% chance to generate 1 explosive bomb |
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[General] Kettle | |
Upon leveling up, Protagonist ATK +1, HP -5 |
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[General] Miracle Starlight | |
Upon depleting all HP, 50% chance to revive |
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[General] Multi-Functional Army Knife | |
Protagonist ATK +5, no bombs will explode |
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[General] Scarlet Goblet | |
Upon leveling up, Protagonist HP +20 |
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[General] Tactical War Weapon | |
Immediately generates a pile of good things |
 |
[General] Wooden Slingshot | |
Upon leveling up, generate 2 Bangboo Plug-Ins |
 |
[General] Zoom Lens | |
Upon destroying an Ether crystal, 50% chance to generate 1 button effect (who knows what will happen?) |
[Hollow]
| Icon | Name | Rank | Effect |
|---|---|---|---|
 |
[Hollow] Bangboo Pillow | |
Protagonist gains +10 HP. |
 |
[Hollow] Bangboo Stand-In | |
50% chance to generate a Coin Tile when defeating monsters. |
 |
[Hollow] Battle Spinner | |
All squad members' HP +10. |
 |
[Hollow] Ben's Strength | |
Opening chests drops more items. |
 |
[Hollow] Blue Shield | |
Each time you collect Coins 10 times, gain +1 ATK |
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[Hollow] Bubble Gun | |
Protagonist gains +50% CRIT Rate but cannot recover HP. |
 |
[Hollow] Casino Banknote | |
Protagonist ATK -5, but gains +1 ATK for every 100 Coins held. |
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[Hollow] Cat Ears Headset | |
Protagonist gains100Gear Coins on CRIT. |
 |
[Hollow] Coin Collection | |
Restocking the shop becomes free |
 |
[Hollow] Combat Gloves Module | |
When picking up Coins, there is a 25% chance to spawn a monster. |
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[Hollow] Combo Sword | |
When picking up coins, there's a 50% chance to generate an explosive bomb. |
|
[Hollow] Combo Sword | |
Gain a temporary +1 ATK when killing monsters. Resets at the end of each floor. |
 |
[Hollow] Deluxe Surprise Box | |
All squad members gain +3 ATK and +30 HP. |
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[Hollow] Demolition Axe | |
Can break through walls! |
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[Hollow] Endgame Wish Star | |
Health Recovery Tiles no longer restore HP, instead giving all squad members +1 ATK |
|
[Hollow] Enhanced Health Medicine | |
Generate 1 explosive bomb every 5 moves and lose 3 HP. |
 |
[Hollow] Exclusive Card Pack | |
When the protagonist takes DMG, 10% chance to refresh up to 10 events within 4 tiles. |
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[Hollow] Expired VIP Card | |
Protagonist gains +10 HP. |
|
[Hollow] Farewell Paper Cranes | |
Place 1 additional explosive bomb above and below when placing bombs. |
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[Hollow] Funny Alarm | |
Protagonist HP +200, HP -3 per movement. |
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[Hollow] Giveaway CD | |
Generates 1 Treasure Chest Tile upon defeating a boss. |
 |
[Hollow] Glass Marbles | |
When the Protagonist attacks, there's a 10% chance to trigger a critical hit, dealing double DMG. |
 |
[Hollow] Grace's Bomb Defuser | |
+25% EXP gained from combat |
|
[Hollow] Health Medicine | |
When picking up Coins, there is a 50% chance to generate a Health Recovery Tile. |
 |
[Hollow] Herbarium | |
All squad members' ATK +1. |
 |
[Hollow] Hollow Robot | |
Significantly increase the chance to generate good items when smashing Ether crystals |
 |
[Hollow] Insect Catalog | |
CRIT Rate against bosses +30%. |
 |
[Hollow] Jackbox Bomb | |
At the start of each floor, generate 15 spikes and 2 Resonium Tiles throughout the floor. |
 |
[Hollow] Kaleido Flashlight | |
Protagonist ATK -10, but squad members gain +4 ATK. |
|
[Hollow] Koleda's Demolition Hammer | |
Spikes no longer deal damage, but instead grant +3 HP. |
 |
[Hollow] Lucky Stars | |
Protagonist gains +4 ATK, but loses -15 HP. |
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[Hollow] Mini Punch Bag | |
Protagonist -2 ATK, +30 HP. |
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[Hollow] Nameless Book | |
When a bomb explodes, random items are generated. (There is a cap on the total output per floor) |
 |
[Hollow] Ordinary Card Pack | |
When the protagonist takes DMG, 10% chance to generate 1 Bangboo Plug-In. |
 |
[Hollow] Paper Airplane | |
Protagonist HP -20, but for every 10 HP, ATK increases by +1. |
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[Hollow] Paper Crane | |
Protagonist gains +15 ATK, which is removed when taking DMG, and resets every floor. |
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[Hollow] Power Hook | |
+1 bomb explosion length. |
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[Hollow] Security Scanner | |
When stepping on spikes, no HP is lost, but 1 explosive bomb is generated. |
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[Hollow] Spray Paint | |
Squadmate +2 ATK |
 |
[Hollow] Standard Power Medicine | |
When picking up Coins, there is a 50% chance to generate an EXP Tile. |
 |
[Hollow] Sword Catalog | |
Protagonist gains 20% lifesteal, but current HP becomes 1. |
 |
[Hollow] Toy Ambulance | |
When the protagonist takes DMG, there's a 20% chance to generate 1 Health Recovery Tile. |
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[Hollow] Toy Castle | |
Protagonist gains +1 ATK |
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[Hollow] Toy Laser Blade | |
Protagonist gains +3 ATK. |
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[Hollow] Toy Stethoscope | |
Squad members' ATK -5, but the protagonist gains +15 ATK. |
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[Hollow] Toy Trumpet | |
Protagonist receives -1 DMG from attacks. |
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[Hollow] VIP Card | |
Receive 50% of spent Coins back when purchasing items. |
 |
[Hollow] Water Gun | |
Protagonist's HP cannot exceed 50. +100%HP recovery. |