Mary: Bay Goddess
Water 
Sniper Rifle 
Supporter 
Burst 1 
Tetra Tier 4 
■ Activates when entering Full Burst. Affects all allies.
Effects vary according to the number of times entered. Each subsequent effect triggers all effects before it:
Once: Recovers 0.62% of the skill user's final Max HP every 1 sec for 5 sec.
Twice: Recovers 2.18% of the skill user's final Max HP every 1 sec for 5 sec.
Three times: Recovers 4.05% of the skill user's final Max HP every 1 sec for 5 sec.
■ Activates when entering Full Burst. Affects all allies.
Effects vary according to the number of times entered. Each subsequent effect triggers all effects before it:
Once: Recovers 0.67% of the skill user's final Max HP every 1 sec for 5 sec.
Twice: Recovers 2.35% of the skill user's final Max HP every 1 sec for 5 sec.
Three times: Recovers 4.36% of the skill user's final Max HP every 1 sec for 5 sec.
■ Activates when entering Full Burst. Affects all allies.
Effects vary according to the number of times entered. Each subsequent effect triggers all effects before it:
Once: Recovers 0.72% of the skill user's final Max HP every 1 sec for 5 sec.
Twice: Recovers 2.52% of the skill user's final Max HP every 1 sec for 5 sec.
Three times: Recovers 4.68% of the skill user's final Max HP every 1 sec for 5 sec.
■ Activates when entering Full Burst. Affects all allies.
Effects vary according to the number of times entered. Each subsequent effect triggers all effects before it:
Once: Recovers 0.76% of the skill user's final Max HP every 1 sec for 5 sec.
Twice: Recovers 2.68% of the skill user's final Max HP every 1 sec for 5 sec.
Three times: Recovers 4.99% of the skill user's final Max HP every 1 sec for 5 sec.
■ Activates when entering Full Burst. Affects all allies.
Effects vary according to the number of times entered. Each subsequent effect triggers all effects before it:
Once: Recovers 0.81% of the skill user's final Max HP every 1 sec for 5 sec.
Twice: Recovers 2.85% of the skill user's final Max HP every 1 sec for 5 sec.
Three times: Recovers 5.3% of the skill user's final Max HP every 1 sec for 5 sec.
■ Activates when entering Full Burst. Affects all allies.
Effects vary according to the number of times entered. Each subsequent effect triggers all effects before it:
Once: Recovers 0.86% of the skill user's final Max HP every 1 sec for 5 sec.
Twice: Recovers 3.02% of the skill user's final Max HP every 1 sec for 5 sec.
Three times: Recovers 5.61% of the skill user's final Max HP every 1 sec for 5 sec.
■ Activates when entering Full Burst. Affects all allies.
Effects vary according to the number of times entered. Each subsequent effect triggers all effects before it:
Once: Recovers 0.91% of the skill user's final Max HP every 1 sec for 5 sec.
Twice: Recovers 3.19% of the skill user's final Max HP every 1 sec for 5 sec.
Three times: Recovers 5.92% of the skill user's final Max HP every 1 sec for 5 sec.
■ Activates when entering Full Burst. Affects all allies.
Effects vary according to the number of times entered. Each subsequent effect triggers all effects before it:
Once: Recovers 0.96% of the skill user's final Max HP every 1 sec for 5 sec.
Twice: Recovers 3.36% of the skill user's final Max HP every 1 sec for 5 sec.
Three times: Recovers 6.24% of the skill user's final Max HP every 1 sec for 5 sec.
■ Activates when entering Full Burst. Affects all allies.
Effects vary according to the number of times entered. Each subsequent effect triggers all effects before it:
Once: Recovers 1% of the skill user's final Max HP every 1 sec for 5 sec.
Twice: Recovers 3.52% of the skill user's final Max HP every 1 sec for 5 sec.
Three times: Recovers 6.55% of the skill user's final Max HP every 1 sec for 5 sec.
■ Activates when entering Full Burst. Affects all allies.
Effects vary according to the number of times entered. Each subsequent effect triggers all effects before it:
Once: Recovers 1.05% of the skill user's final Max HP every 1 sec for 5 sec.
Twice: Recovers 3.69% of the skill user's final Max HP every 1 sec for 5 sec.
Three times: Recovers 6.86% of the skill user's final Max HP every 1 sec for 5 sec.
■ Activates when using Burst Skill. Affects all Water Code allies.
Effects vary according to the number of times used. Each subsequent effect triggers all effects before it:
Once: Elemental Advantage Attack Damage ▲ 3.43% for 3 sec.
Twice: Elemental Advantage Attack Damage ▲ 3.43% for 5 sec.
Three times: Elemental Advantage Attack Damage ▲ 2.97% for 10 sec.
■ Activates when using Burst Skill. Affects all Water Code allies.
Effects vary according to the number of times used. Each subsequent effect triggers all effects before it:
Once: Elemental Advantage Attack Damage ▲ 5.36% for 3 sec.
Twice: Elemental Advantage Attack Damage ▲ 4.59% for 5 sec.
Three times: Elemental Advantage Attack Damage ▲ 3.57% for 10 sec.
■ Activates when using Burst Skill. Affects all Water Code allies.
Effects vary according to the number of times used. Each subsequent effect triggers all effects before it:
Once: Elemental Advantage Attack Damage ▲ 7.3% for 3 sec.
Twice: Elemental Advantage Attack Damage ▲ 5.75% for 5 sec.
Three times: Elemental Advantage Attack Damage ▲ 4.17% for 10 sec.
■ Activates when using Burst Skill. Affects all Water Code allies.
Effects vary according to the number of times used. Each subsequent effect triggers all effects before it:
Once: Elemental Advantage Attack Damage ▲ 9.24% for 3 sec.
Twice: Elemental Advantage Attack Damage ▲ 6.91% for 5 sec.
Three times: Elemental Advantage Attack Damage ▲ 4.76% for 10 sec.
■ Activates when using Burst Skill. Affects all Water Code allies.
Effects vary according to the number of times used. Each subsequent effect triggers all effects before it:
Once: Elemental Advantage Attack Damage ▲ 11.17% for 3 sec.
Twice: Elemental Advantage Attack Damage ▲ 8.07% for 5 sec.
Three times: Elemental Advantage Attack Damage ▲ 5.36% for 10 sec.
■ Activates when using Burst Skill. Affects all Water Code allies.
Effects vary according to the number of times used. Each subsequent effect triggers all effects before it:
Once: Elemental Advantage Attack Damage ▲ 13.11% for 3 sec.
Twice: Elemental Advantage Attack Damage ▲ 9.24% for 5 sec.
Three times: Elemental Advantage Attack Damage ▲ 5.96% for 10 sec.
■ Activates when using Burst Skill. Affects all Water Code allies.
Effects vary according to the number of times used. Each subsequent effect triggers all effects before it:
Once: Elemental Advantage Attack Damage ▲ 15.04% for 3 sec.
Twice: Elemental Advantage Attack Damage ▲ 10.4% for 5 sec.
Three times: Elemental Advantage Attack Damage ▲ 6.56% for 10 sec.
■ Activates when using Burst Skill. Affects all Water Code allies.
Effects vary according to the number of times used. Each subsequent effect triggers all effects before it:
Once: Elemental Advantage Attack Damage ▲ 16.98% for 3 sec.
Twice: Elemental Advantage Attack Damage ▲ 11.56% for 5 sec.
Three times: Elemental Advantage Attack Damage ▲ 7.16% for 10 sec.
■ Activates when using Burst Skill. Affects all Water Code allies.
Effects vary according to the number of times used. Each subsequent effect triggers all effects before it:
Once: Elemental Advantage Attack Damage ▲ 18.92% for 3 sec.
Twice: Elemental Advantage Attack Damage ▲ 12.72% for 5 sec.
Three times: Elemental Advantage Attack Damage ▲ 7.76% for 10 sec.
■ Activates when using Burst Skill. Affects all Water Code allies.
Effects vary according to the number of times used. Each subsequent effect triggers all effects before it:
Once: Elemental Advantage Attack Damage ▲ 20.85% for 3 sec.
Twice: Elemental Advantage Attack Damage ▲ 13.88% for 5 sec.
Three times: Elemental Advantage Attack Damage ▲ 8.36% for 10 sec.
Tranquil Waters
■ Affects all Water Code allies.
ATK ▲ 13.72% for 3 sec.
■ Affects all allies.
Max HP ▲ 16.47% of the skill user's final Max HP for 10 sec.
■ Affects all Water Code allies.
ATK ▲ 14.78% for 3 sec.
■ Affects all allies.
Max HP ▲ 17.74% of the skill user's final Max HP for 10 sec.
■ Affects all Water Code allies.
ATK ▲ 15.84% for 3 sec.
■ Affects all allies.
Max HP ▲ 19% of the skill user's final Max HP for 10 sec.
■ Affects all Water Code allies.
ATK ▲ 16.89% for 3 sec.
■ Affects all allies.
Max HP ▲ 20.27% of the skill user's final Max HP for 10 sec.
■ Affects all Water Code allies.
ATK ▲ 17.95% for 3 sec.
■ Affects all allies.
Max HP ▲ 21.54% of the skill user's final Max HP for 10 sec.
■ Affects all Water Code allies.
ATK ▲ 19% for 3 sec.
■ Affects all allies.
Max HP ▲ 22.8% of the skill user's final Max HP for 10 sec.
■ Affects all Water Code allies.
ATK ▲ 20.06% for 3 sec.
■ Affects all allies.
Max HP ▲ 24.07% of the skill user's final Max HP for 10 sec.
■ Affects all Water Code allies.
ATK ▲ 21.12% for 3 sec.
■ Affects all allies.
Max HP ▲ 25.34% of the skill user's final Max HP for 10 sec.
■ Affects all Water Code allies.
ATK ▲ 22.17% for 3 sec.
■ Affects all allies.
Max HP ▲ 26.61% of the skill user's final Max HP for 10 sec.
■ Affects all Water Code allies.
ATK ▲ 23.23% for 3 sec.
■ Affects all allies.
Max HP ▲ 27.87% of the skill user's final Max HP for 10 sec.
Skill recommendations
Build
CUBES
Vigor or Healing cubes for extra heals if your units are dying. Resilience otherwise for faster reloads.
OL GEAR
Most support units do not usually care about specific lines outside the CP padding for their buffs (caster's ATK when applicable) and increasing survibavility.
Doesn’t benefit from any specific overload lines. At high investment can act as a sub-dps and healer so you could get Elemental damage, ATK and max ammo.
Synergies & notes
New players can use her for Water content since she provides decent heals + elemental damage for everyone in the team, but for people who have a wide roster of characters, she falls off pretty hard since her numbers are just not there.
Biggest problem for ANY B1 in the game is competing for the CDR spot and Mary, compared to modern B1 characters, can't put up a fight.
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 information.
Usage shown is based on the date the unit was released to avoid empty spaces on previous raids.