Can Life Model Decoy negate the penetrating damage that Parasite takes from using the drained power???

Or does Life Model Decoy only negate unavoidable damage???

Please Help!!!

Life Model Decoy does indeed prevent penetrating damage and works to prevent Attack/Defense drain damage feedback. However it makes his Leech ability unusable as you cannot heal yourself when you have Life Model Decoy.

Life Model Decoy cannot prevent unavoidable damage.

so how does LMD work vs Ap?

LMD only serves to reduce damage dealt by one if it is not reduced by any other effect. Armor Piercing says that its figure's damage dealt may not be reduced BELOW one. Even if a figure is only dealing one damage with Armor Piercing, its damage may not be reduced below one, so it will override LMD.