A Vibrant Heart Story Walkthrough and Guide
★ Tier Lists: Characters | Weapons | Geniemons
★ Builds: Fina | Lynn | Psyche | Lady Nifle | Rebecca
★ Versions: Rainbow-Coloured Dream | Version 1.1
★ How to Get Characters | Mystic Maze | Redeem Codes
★ All Character Weapons | Siren's Kiss | Pyrothirst
★ On a Gentle Breeze | Dead or Alive | Judgment Day
Here you'll find a walkthrough for the main quest A Vibrant Heart in Duet Night Abyss (DNA). Read on to learn how to complete A Vibrant Heart, quest rewards and objectives, dialogue impressions, and more information!
| ◄ Previous Quest | Next Quest ▶ |
|---|---|
| Beyond the Sands | Guns and Vines |
A Vibrant Heart Story Walkthrough
Advance Deeper Into the Fortress
Follow the quest marker to the end of the corridor and turn left until you reach another room.
Repel the Filthoids
Upon reaching the room, Filthoids will be rushing in from a circular vent. Defeat them until the vent closes to progress through the quest.
Head to the Engine Room
Go through the door in the next room. Shoot the wall-mounted turrets with your ranged weapon. Follow the quest marker straight down the stairs, turn right, and then turn left, until you reach the door to the engine room.
Enter the Engine Room
After conversing with Avar in a cutscene, turn right and jump over the wall to proceed.
Following the quest marker, run straight ahead until you encounter the Veloci Filthoid - Blast. Turn to the door on the left and keep heading straight.
Once you enter the corridor, enter the first door on the left and then follow the quest marker to reach the Engine Room's control panels.
After Monica gives you the rundown of the situation, head to the right door and down to reach the Engine Room.
Disarm the Mechanism
Shoot the mechanism's button with your ranged weapon.
Locate and Shut Down the Active Phoxynamo Wheel
Follow the quest markers to the location of the three Phoxynamo Wheel switches.
Follow the blue-lit cables on the ground to help find the Phoxynamo Wheel switches.
| A |  Interact with the device panel to shut down this Phoxynamo Wheel. |
|---|---|
| B |  Interact with the device panel to shut down this Phoxynamo Wheel. |
| C |  Shoot the button to shut down this Phoxynamo Wheel. |
| Optional |  You can find Vic near the button of the Phoxynamo Wheel C in this location. This objective will become unavailable if you shut down all the Phoxynamo Wheels. |
Examine the Phoxichor Tank
Go to the Phoxichor tank, which is located in the central area of the engine room.
Proceed to the Lower Level of the Engine Room
Follow the quest marker to find and open the hatch to the lower level of the engine room.
Activate the Four Backup Phoxynamo Wheels
After landing on the engine room's lower level, you will be tasked with activating the four backup Phoxynamo Wheels.
| 9.1 |  Shoot the backup Phoxynamo Wheels to activate them. |
|---|---|
| 9.2 |  Before you can proceed to the next wheel, wait for Avar to unlock the backup controls. To keep track of this, you can refer to the yellow cooldown timer on the top. |
| 9.3 |  Repeat this process for the other three Phoxynamo Wheels. |
Escape From the Engine Room
Wait for a few seconds for the cutscene to play. Fulvis will relay orders to press on to the central control room despite the casualties sustained. Choose how to respond to Fulvis' command and Avar's question.
| Prompt 1 | ||
|---|---|---|
| ... | ||
| Response | Impression | Points |
| (Stay silent) | Benefit | +3 |
| Receiving enough support gives us a better chance of victory. A victory in your name, sir. | Wisdom | +3 |
| Since you're so full of courage, why don't you come to the front yourself? | Chaos | +3 |
| Prompt 2 | ||
| I also picked up a signal from another squad reporting their position, right after Fulvis ended his call. Mors, what are you gonna do? | ||
| Response | Impression | Points |
| I intend to get to the soldiers first. We don't stand a chance on our own. | Empathy | +3 |
| Even though our chances are slim, we must adhere to the Chief Commander's orders. | Morality | +3 |
A Vibrant Heart Bosses
No Boss Fight in A Vibrant Heart
| There is no boss fight in A Vibrant Heart. |
|---|
A Vibrant Heart Rewards
| Obtainable Rewards |
 Secret Letter Clue
x10
|
 Combat Melody III
x3
|
 Weapon Manual II
x8
|
|---|---|---|
 Coin
x100000
|
||
A Vibrant Heart Previous and Next Quests
| ◄ Previous Quest | Next Quest ▶ |
|---|---|
| Beyond the Sands | Guns and Vines |
Duet Night Abyss Related Guides
All Quest Types
| All Quest Types | |
|---|---|
| Main Quests | Side Quests ＆ [Special] Side Quests |
| Dynamic Quests | |
List of All Main Quests
Prologue
Chapter 1: Noctoyager Act 1
Chapter 2: Twilight Act 1
Chapter 3: Noctoyager Act 2List of All Event Quests
Beyond the Page
Farewell to the Cavern of Yesterday
Old Friends, New Tales
Through the Labyrinth of Memory
Unexpected Commission
Across the Thorned Vale
Little Nightingale, Take Wing for Tomorrow
Onto the Blooming Fields
Author
A Vibrant Heart Story Walkthrough and Guide
Rankings
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In first dialogue, choosing "Receiving enough support gives us a better chance of victory. A victory in your name, sir." gives +3 Wisdom, not Benefit.