Label
Iron 
Assault Rifle 
Defender 
Burst 1 
Elysion Tier 3 Meeting and Parting (Imagined)
■ Activates at the start of battle. Affects self.
Delusion: Creates a Shield equal to 30.15% of caster's final Max HP. This effect is continuous.
■ Activates when Delusion status ends. Affects self.
Delusion Shattered: Activates up to 2 time(s). This effect is continuous.
Effect 1: Imagined Heartbreak: Prevents being targeted by single-target attacks for 1 sec × Delusion Shattered count. This effect is removed upon taking a direct hit.
Effect 2: Stuns for 1 sec per Delusion Shattered stack.
■ Activates when performing a normal attack while not in Delusion status. Affects self.
Delusion: Creates a Shield equal to 30.15% of caster's final Max HP. This effect is continuous.
■ Activates when using Burst Skill while not in Delusion status. Affects self.
Delusion: Creates a Shield equal to 30.15% of caster's final Max HP. This effect is continuous.
Sweetness of Love (Imagined)
■ Activates at the start of battle. Affects all allies (except self).
Damage taken from Electric Code enemies ▼ 70.4% for 5 sec.
Activates 1 time(s) per battle.
■ Activates only while in Delusion status. Affects self.
Burst Gauge filling speed ▲ 70.4% continuously.
ATK ▲ 93.3% continuously.
Damage taken from Electric Code enemies ▼ 70.4% continuously.
■ Activates only while in Shared Delusion status. Affects all allies (except self).
ATK ▲ 80.36% of the caster's ATK continuously.
Bursting Heart
■ Affects self.
Max HP ▲ 20.26% for 10 sec.
Shared Delusion: The Shield created by Label becomes invulnerable for 10 sec.
Skill recommendations
Build
CUBES
Highest cube you have to improve the ATK buff on skill 2. For most people this is either Resilience or Bastion.
OL GEAR
Doesn’t benefit from any specific lines of OL, you can just get some ATK and anything that will increase her combat power.
Solo Raid Usage
This is based on the top 50 players of all NIKKE servers combined. Data is from enikk.app, check their website for a lot more raid data.
Pros & Cons
- Big ATK buff on her burst to everyone on the team thanks to skill 2 (80%), but requires high investment. You can leave it at level 7 if low on resources (69% instead)
- Can be used as a replacement for Exia (Treasure) or Miranda (Treasure) on Solo Raids, but honestly speaking there are few reasons to use her outside Iron weak raids
- For PVE content, outside her skill 2, her kit is just awful and provides nothing. This can be seen as a pro since she is a "cheap" unit to build
- Since she only gives ATK team compositions are a bit limited, considering most newer damage dealers already buff themselves so much