Dark Bard's Getting Into It states that
An enemy absorbing, reflecting, or being immune to your Fire, Dark, or Sound damage triggers the following effects for 2 Rounds (3 if Volume Up is active):
1) Disables absorb, reflect, and immunity for that element.
2) Inflicts Lingering Damage LV X (X = half of damage) of the same type, and Battle Rush LV 5.
3) Infliction-based chance to apply Confusion.
The skill states that it applies to enemies but right now, allies that are hit by your kickback damage that absorb/reflect/have immunity to the stated elements also proc it, causing them to gain all the negative effects.
An enemy absorbing, reflecting, or being immune to your Fire, Dark, or Sound damage triggers the following effects for 2 Rounds (3 if Volume Up is active):
1) Disables absorb, reflect, and immunity for that element.
2) Inflicts Lingering Damage LV X (X = half of damage) of the same type, and Battle Rush LV 5.
3) Infliction-based chance to apply Confusion.
The skill states that it applies to enemies but right now, allies that are hit by your kickback damage that absorb/reflect/have immunity to the stated elements also proc it, causing them to gain all the negative effects.
