This article is a comprehensive guide to Yale and Oliver in Duet Night Abyss (DNA), covering their rating, recommended builds (weapons and demon wedges), skills, introns, and more.
All Character ListsTable od Contents
Yale and Oliver Character Overview

Yale and Oliver Information
| Element | Pyro |
|---|---|
| Role | DPS,Skill DMG |
| Weapon (Melee) | Sword |
| Weapon (Ranged) | Shotgun |
Yale and Oliver Tier / Rating
| Playable | Combat Partner |
|---|---|
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Pyro DPS Duo
Yale and Oliver specialize in high Skill Damage using their Tot Popper bombs. Yale focuses on reducing enemy Stance while Oliver maximizes burst damage.
High-Impact Bombers
Their abilities allow them to control the battlefield by placing bombs strategically and detonating them for massive Pyro damage, making them excellent at dealing both single-target and AoE damage.
Best Character Tier ListYale and Oliver Stats
*Skill increases are not included.
| Lv. 1 | Lv. MAX(80) | |
|---|---|---|
| ATK | 33.6 | 395.39 |
| HP | 96 | 1,205 |
| Shield | 96 | 1,205 |
| DEF | 288 | 288 |
| Max Sanity | 180 | 180 |
| Skill DMG | 100% | 120% |
| Skill Range | 100% | 100% |
| Skill Duration | 118% | 118% |
| Skill Efficiency | 100% | 100% |
| Morale | 0% | 0% |
| Resolve | 0% | 0% |
How to Unlock or Get Yale and Oliver?
Unlock Through Nocturnal Echoes: Crystalophile

Currently, the only way to get Yale's Secret Letter is by clearing Nocturnal Echoes: Crystalophile at Lv. 50. The Secret Letter is a guaranteed drop, but the amount you get will be random.
Only 5 Completion Rewards Per Week
Nocturnal Echoes have a limit to how many times you can get rewards from them. Each week, you can only get 5 chances of getting their rewards. This limit is shared out across all the Nocturnal Echoes.
Yale and Oliver Best Weapon
Yale and Oliver's Best Melee Weapon
| Best Melee Weapon |
|---|
Blade Amberglow |
To prevent overstacking on Skill DMG, Blade Amberglow's ATK boost can help increase Yale and Oliver's damage. Wanewraith can be used for Skill DMG boost if you feel that you have enough ATK from Demon Wedges.
Yale and Oliver's Best Ranged Weapon
| Best Range Weapon |
|---|
Excresduo |
Excresduo is preferred for Yale and Oliver since it can boost the damage of their Tot Poppers. While Screamshot increases Skill Duration and is a weapon they're proficient on, Skill Duration doesn't benefit them due to how Nightmare Lab works.
Yale and Oliver's Best Partner Weapon
| Best Range Weapon |
|---|
Wanewraith |
Since Combat Partners can equip one weapon, Skill DMG boosting weapons like Wanewraith or Excresduo are good for Yale and Oliver. Wanewraith is preferred since ammo can be a limiting resource depending on the game mode.
Yale and Oliver Best Demon Wedge
Yale and Oliver's Skill
Skill Values shown is at level 1.
| Tot Popper Type:DMG | Sanity Cost: 15 [Tot Popper: Yale's Make] DMG: 502.0% [Tot Popper: Oliver's Make] DMG: 836.0% Cross-Shaped Area Length: 15.0m Cross-Shaped Area Width: 4.0m |
|---|
Tot Popper
Drops a bomb named [Tot Popper], assuming the form of either [Tot Popper: Yale's Make] or [Tot Popper: Oliver's Make]. Upon landing, the bomb explodes after 2s, dealing Pyro Damage to enemies within a cross-shaped area and detonating any other [Tot Poppers] within range. A maximum of 10 [Tot Poppers] can exist at the same time.
Tot Popper: Yale's Make
When dealing damage, causes greater Stance reduction to the target(s). The greater the difference between Yale and Oliver's Skill Range and the Skill Damage, the higher the chance of deploying [Tot Popper: Yale's Make]. If the difference is no less than 50%, it's guaranteed to be a [Tot Popper: Yale's Make].
Tot Popper: Oliver's Make
Deals higher damage. The greater the difference between Yale and Oliver's Skill Damage and the Skill Range provided by equipped Demon Wedges, the higher the chance of deploying [Tot Popper: Oliver's Make]. If the difference is no less than 50%, it's guaranteed to be a [Tot Popper: Oliver's Make].
| Nightmare's Grasp Type:DMG | Sanity Cost: 30 |
|---|---|
Nightmare's Grasp
Generates [Nightmare Lab] around Yale and
Oliver. Using the skill again can close [Nightmare Lab] in advance.Nightmare Lab
When in the area of [Nightmare Lab]: The Movement Speed of enemies within range is decreased.
The detonation timers of [Tot Poppers] on the ground are paused, and they won't be detonated by other [Tot Poppers].When [Nightmare Lab] closes:Detonates all [Tot Poppers] within range and the lab explodes to deal Pyro Damage to the enemies within range. For each [Tot Popper] detonated, increases the explosion damage of [Nightmare Lab] and restores Sanity for Yale and Oliver.| The Rules of Bomb Type:Passive | [Tot Popper] Landing DMG: 213.0% [Tot Popper] Landing Radius: 6.0m |
|---|
The Rules of Bomb
When a [Tot Popper] is deployed, if it's no less than 2 metres above the ground, it deals Pyro Damage to nearby enemies upon landing.
Yale and Oliver's Intron
| I1 | If a [Tot Popper] is detonated by a different type of [Tot Popper] restores 1 point of Sanity for Yale and Oliver; if detonated by the same type, restores 2. |
|---|---|
| I2 | The Movement Speed decreased effect inflicted on enemies in [Nightmare Lab] is increased to 60%. |
| I3 | [Tot Popper] Level +2; [The Rules of Bomb] Level +1. |
| I4 | Wen deploying a [Tot Popper] in [Nightmare Lab], there's a 45.0% chance to deploy 1 additional [Tot Popper]. |
| I5 | [Nightmare's Grasp] Level 2+; [The Rules of Bomb] Level +1. |
| I6 | When Yale and Oliver is applied with [Bombing Frenzy], each deployed [Tot Popper] combines the features of both types, dealing higher damage and posing greater Stance reduction. |
Profile
| Gender | Female |
|---|---|
| Birthplace | Hyperborean Empire |
| Birthday | December 20 |
| Allegiance | Unaffiliated |
Yale and Oliver's Trats
| Tamer | Skilled in training Geniemons |
|---|---|
| Impression: Wisdom | Quick-witted or highly knowledgeable in specific fields. |
| Astute Mind | Adapts quickly and may obtain bonus rewards. |