Leona
Water 
Shotgun 
Supporter 
Burst 2 
Tetra Tier 4 Thunderous Roar
■ Activates after 5 normal attacks. Affects all allies.
Roar: Critical Rate ▲ 2.62%, stacks up to 5 times and lasts for 5 sec.
■ Activates after 15 normal attacks. Affects all allies with a Shotgun.
Maximum Effective Range ▲ 20% for 10 sec.
Courageous Look
■ Activates when entering Full Burst. Affects all allies.
Hit Rate ▲ 20.28% for 10 sec.
■ Activates when entering Full Burst. Affects 2 ally units with the highest ATK and a Shotgun.
Increases number of pellets by 5 for 10 sec.
Lion's Heart
■ Affects all allies.
Critical Damage ▲ 34.64% for 10 sec.
■ Activates when the caster's Roar is fully stacked. Affects all allies with a Shotgun.
Critical Rate ▲ 21.32% for 10 sec.
Skill recommendations
Build
CUBES
Bastion. Your DPS units take priority over her, if no empty slots, can use resilience.
OL GEAR
Not recommended to OL, but you can use max ammo capacity, elemental damage and ATK. Crit and hit rate is provided on her kit, so not necessary but good filler 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.
Pros & Cons
- Best chibi in the game hands down
- Still a great option for water weak raids on shotgun compositions with Dorothy: Serendipity and Drake (Treasure), but almost no usage outside that
- Increased pellets doesn't increase damage, making shotgun compositions quite limited. Versatile buffer for crit teams and people lacking other burst 2 buffer / supporter units.
- Maximum effective range is useless in PVP and situational for PVE since shotguns compositions are only used on some bosses