D.D. Warrior Lady

Edison Card Text
① If this card battles an opponent's monster, after damage calculation:
You can banish that monster, also banish this card.
No targeting
Damage Step • Substep 6
Banlist • Unlimited
Interactions
If D.D. Warrior Lady attacks Nightmare Penguin, does Penguin bouncing it stop the banish?✓
Both effects trigger in substep 6 of the Damage Step.
No. Nightmare Penguin is mandatory and becomes CL1, D.D. Warrior Lady is optional and becomes CL2. D.D. Warrior Lady resolves first and banishes both before Penguin can resolve.
What happens if D.D. Warrior Lady attacks Snowman Eater?✓
D.D. Warrior Lady battles a face-down Snowman Eater.
Snowman Eater's effect is mandatory and becomes Chain Link 1, targeting a monster. D.D. Warrior Lady's effect is optional and becomes Chain Link 2 if the player decides to activate it. D.D. Warrior Lady resolves first and banishes both; Snowman then resolves and destroys its target only if it is still on the field.
Rulings
edisonformat.net
● If this card battles a Flip monster, the Flip effect will chain to this card's effect. The flip effect will always be Chain Link 1.
● If either monster is not banished for some reason, the other monster is still banished.
● "After Damage Calculation" happens after battle damage is inflicted, but before monsters are sent to the GY.
edisonformat.com
(1) When this card battles your opponent’s monster, after damage calculation you can remove from play the opponent’s monster and this card.
The (1) optional Trigger Effect activates & resolves on the field.
This effect activates in Substep 6 - Resolve Effects of the Damage Step.
Example 1: If "D.D. Warrior Lady" attacks a set Flip Effect Monster, the mandatory Flip Effect will be Chain Link 1 and "D.D. Warrior Lady’s" optional effect may be Chain Link 2.
Example 2: If your "D.D. Warrior Lady" attacks your opponent’s "D.D. Warrior Lady", your "D.D. Warrior Lady’s" effect may be Chain Link 1, and your opponent's may be Chain Link 2.
This effect can only activate if this card participated in Substep 4 - Damage Calculation.
This effect cannot activate if this card leaves the field before Substep 4 (by "Ehren, Lightsworn Monk").