If Gatts said that Farnese "is so strong" when he was at him, possesed, that she really must be strong, cause it Gutts in all. But that's not her strength, but the ghost xD
Farnese was thinking that Serpico is able to kill Gats himself, even with anybody's help, gatts who fought all those monsters :D
That scene when she was possesed and like seduce Gatts was quite hot. Btw. it was true that what the voice said to her, or just a persuade?