Elemental Resonance
When you have a full party, you will receive bonus effects, known as Elemental Resonances, that correspond to the Elemental Types present in the party.

List of Elemental Resonances

Fervent Flames
Affected by Cryo for 40% less time. Increases ATK by 25%.
Soothing Water
Affected by Pyro for 40% less time. Increases incoming healing by 30%.
High Voltage
Affected by Hydro for 40% less time. Superconduct, Overloaded, and Electro-Charged have a 100% chance to generate an Electro Elemental Particle (CD: 5s).
Shattering Ice
Affected by Electro for 40% less time. Increases CRIT Rate against enemies that are Frozen or affected by Cryo by 15%.
Impetuous Winds
Decreases Stamina Consumption by 15%. Increases Movement SPD by 10%. Shortens Skill CD by 5%.
Enduring Rock
Increases shield strength by 15%. Additionally, characters protected by a shield will have the following special characteristics: DMG dealt increased by 15%, dealing DMG to enemies will decrease their Geo RES by 20% for 15s.
Protective Canopy
Any 4 Unique Elements
All Elemental RES +15%, Physical RES +15%.

Trial Character Resonances

All Trial Characters in Story Quests and Hangouts do not contribute to or benefit from the party's Elemental Resonances.

Swirl Chain Reactions Can Trigger Electro Resonance

Swirling Hydro, Pyro, or Cryo onto an enemy affected by Electro or vice versa will trigger High Voltage. This shares the particle generation cooldown with when you trigger it normally.

Cryo Resonance Applies Crit Rate For Cryo Before Reactions

Cryo resonance determines if an enemy has Cryo for its buff before reactions remove auras.

Evidence Vault