Charlene Masks

Do you mean through Critical Counterattack, or Critical Smash? I've Critical Counterattacked her plenty of times and she never drops anything.

Critical Smash.

Also remember that it can't be a Killing Blow. Setting anyone to finish will not remedy this either.

Critical Counter only works for Succubi and Incubi. Sirens have always been Critical Smash.

And Charlene is a Siren.

But for some reason you still get title for Critical Counter... I think they might have messed it up?

Ya, but I clarified on it.

I got the Siren title on an alt on Charlene through a critical Smash. (Her mask also dropped.) This was the Charlene from the Rush of Love quest chain.

Masks are probably going to drop to worthless.