Novel
Iron 
SMG 
Defender 
Burst 2 
Tetra Tier 5 Something's Fishy Here (Cooldown: 10s)
■ Affects 3 enemy unit(s) with the highest DEF.
Deals 52.36% of final ATK as damage.
DEF ▼ 7.05% for 5 sec.
Detective's Intuition
■ Activates after landing 100 normal attack(s). Affects self.
Cornucopia: DEF ▲ 13.5%, stacks up to 5 time(s) and lasts for 15 sec.
Case Closed
■ Affects 1 enemy unit(s) with the highest ATK.
Deals 330.61% of final ATK as damage.
■ Activates when "Cornucopia" is fully stacked. Affects 1 enemy unit(s).
Damage Taken ▲ 67.5% for 5 sec.
Skill recommendations
Build
CUBES
Resilience, Bastion, or Quantum. Whatever you have with an empty slot is good. Quantum is a good cube for extra burst generation on support units like Novel.
OL GEAR
Other than max ammo capacity, the rest of the lines can be whatever you get since she doesn’t deal that much damage. Hit rate, ATK and elemental damage are always welcomed stats.
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.
Extra notes
By today's standards, a really bad kit that's just underwhelming on most (if not all) PVE content. Invest only if she is your waifu.