Laplace
hero
Iron 
Rocket Launcher 
Attacker 
Burst 3 
Missilis Tier 5 Hero Vision
■ Activates when attacking with Full Charge. Affects self.
Hero Vision: Explosion Range up 3.57%, stacks up to 5 time(s) and lasts for 5 sec.
Hero Bomber
■ Activates when the last bullet hits the target. Affects the target.
Deals 81.66% of final ATK as additional damage.
■ Activates when hitting the Boss Parts. Affects the target.
Deals 14.78% of final ATK as additional damage.
Laplace Buster
■ Affects Self.
Change the weapon in use:
Initial Damage: 897.6% of final ATK
Damage Over Time: 14.52% of final ATK
Lasts for 5 sec.
Additional Effect: Pierce.
Attention: Unable to take cover when using Burst Skill.
■ Affects the same enemy unit(s) when "Hero Vision" is fully stacked.
Deals 11.9% of final ATK as true damage.
Skill recommendations
Build
CUBES
Resilience for faster reload.
OL GEAR
ATK, charge speed and elemental damage take priority. Charge damage and crit for filler lines. Avoid max ammunition capacity.
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.