DNA Character Guide

Many character guides for Duet Night Abyss (DNA) go through what Weapons, Demon Wedges, Geniemons, and Partners each character should have.

This character guide will focus on instead other tips and factors and how the character is used and played.

Rebecca

Defense, Exploration, Expulsion, and Hedge missions when they are too hard to AFK reliably.
This means maximizing her long-term damage potential by fielding as many Aurelian Caress (Jellyfish Summons) at the same time and sustaining it over the mission.

MANUAL control recommended IF you are doing really tough defense/area denial content

But in practice you will almost never play her manually. There is so much area denial content she can help you handle that you might as well let the AI do it and go AFK on the mission.
As a PARTNER the AI skill management is terrible

Frequently gets stuck in running animation if any jumping is required to get to the player. Frequently just stays idle. Often she eventually moves and drops Jellyfish but some AFK runs can unexpectedly fail because of her AI pathing.

To reactivate her, move the main character. Sometimes you have to move really far to trigger her follow response to override her current looping running action.

The AI tends to spend Sanity as soon as it gets it and doesn't manage Sanity to sustain Aurelian Caress (Jellyfish Summons). Often she will then use melee attacks on targets that are still alive (e.g. a tough Primander) and end up pushing them out of her Jellyfish range.
If she's equipped with a ranged weapon, she won't move as much but strangely she is also more hesitant to use Aurelian Caress to defend the location. This can cause an otherwise easy Defense mission to fail.
If she has a melee weapon as Partner, she's likely to run off to engage enemies and spam all her Jellyfish there. This is actually RISKY for Noctoyager Commissions where you have to pick up the Wedge drops from the Primander. The drop could be too far even for Bro Boxie and you could miss it if you were AFK.
Even so, for Defense missions against fairly easy enemies, she will still do okay because enemies drop enough Sanity potions that she can rush around and relocate her Jellyfish. But once enemies start getting harder, AFK becomes more iffy, especially as sometimes the Partners literally just stand around doing nothing while enemies are right in front of them attacking the defense target or your main character.
If you hold down "E" instead of tapping it, you can place the Jellyfish at a distance. Even the AI doesn't seem to do this (though in general it's not that important).
She'll sometimes drop Jellyfish quite spaced apart especially once she's at Intron II and can put down five.

This means enemy drops can be quite far off and if you have an "ejection" Commission (where it ends suddenly) you could be missing some loot drops.
If you are farming the missions AFK, sometimes you will miss the XP because the kills are too far away.
Most loot drops aren't particularly important, but over time, when you have 10000+ of a material, they are basically worth a lot of Coin.
You can try to mitigate this by limiting her line of sight, such as positioning yourself so that enemies have to come round a corner or through a door that closes. When enemies appear, then she moves, and since they are already close by, she'll probably drop her Jellyfish close.

She's more reliable as an AI Partner with Fushu to help her recover Sanity, and use both her Jellyfish and her ultimate. Without Fushu, she often runs out of Sanity because she uses her ultimate instead of managing Sanity to maintain uptime on her Jellyfish and reposition them when necessary.

Generally you want to stagger her Summons instead of dropping multiple ones at the same time.

This is especially important if you aren't killing enemies quickly enough for them to drop a lot of Sanity potions.
So if you need all three up to kill things before you get swarmed, and your Duration is 15 seconds, then space them out at maybe one every 5 seconds and refresh them as each one expires.
This is so that in between summons you get a chance to recover your Sanity and have 100% uptime on all Summons instead of suddenly needing around 100 Sanity to drop all three.

You also want to stagger the pulses. Each pulse has slight hitstun on the target, so if the various Jellyfish all pulse at approximately the same time, the overlapping stun results in a shorter duration overall. But if they pulse in sequence, the enemy gets repeatedly stunned and their advance and actions are slowed much more.

You want the range of the Aurelian Caress (Jellyfish Summons) such that if you are standing near the center, enemies that attack at range will still have to enter the radius of your overlapping killzones before they can shoot at you.
This is important for Defense Missions if you want reliable damage without having to reposition your Summons.
Often you can choose your location you can try to find one where enemies are forced to close close enough to enter the field (e.g., they have to come around a corner or through a door). But sometimes Defense missions will just be in the wide open with no cover.
If you are using Bahamut's Misty Veil, the Skill Range bonus from that Demon Wedge will not be visible on your Total Attributes readout.

On paper it looks like a powerful burst attack but it costs a lot of Sanity compared to the damage over time you can get from sustaining your Jellyfish instead.
Enemies thrown into the air take no damage from damage-over-time effects until they land.
The range generally exceeds your Jellyfish range, so throwing enemies into the air could just delays them getting into your damage radius.

For all characters, the best Geniemon is generally Bro Boxie unless you're pushing the edge of what you can fight and winning by narrow margins.

You can get bonus drops apparently with even base Commissions Rewards and not just enemy drops.
There are only two known (guaranteed) spawn points so to ascend them further (and increase the bonus loot drop rate) you need the Yum-Yum Milk from Immersive Theatre.
The increased loot gathering range is huge for general convenience and AFK farming. Without this, you generally need to run around grabbing loot including Serum drops during Exploration missions.

One of the disadvantages of Bro Boxie however is you have less control over when you pick up potion drops. The game will automatically vacuum up for example a Sanity potion if you are even 1 point short of full Sanity. This can waste a lot of them for a character who needs to manage the supply over a long fight.
If you want more Duration and help with Sanity sustain, try a geniemon like Pyrootail which gives a Duration bonus and also drops a Sanity potion.

It does not appear her Jellyfish damage-over-time attacks Sybille's Chaotic Thunderorb (from her Stormcaller summon skill).
Psyche with healing support (Truffle/Fushu) to give her unlimited time airborne can be better for AFK clears.

Certainly does better against Primanders in Defense missions, which Rebecca can struggle against. She can clear faster than Rebecca as a result.
For very low level missions where the AI can practically one-shot enemies with their weapons, there won't be much difference.

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