Refinements:

ATK is increased by 12%/15%/18%/21%/24%. When the equipping character is off-field, ATK is increased by an additional 12%/15%/18%/21%/24%. After initiating healing, the equipping character and the character(s) they have healed will obtain the "Sweet Echoes" effect, increasing their ATK by 32%/40%/48%/56%/64% for 3s. This effect can be triggered even if the equipping character is off-field."