Well... yes? I'm sure he will try to get some intel given the chance, that doesn't mean he will try something on her thou; now, he's crafty yes, but I doubt he will use the drug on her:
a. because we are out of stock and haven't seen our dealer in quite some time, and I'm sure MC will be savvy if he gets his hands on some of it after the shortage, and
b. because Helen, being not just aware of its existence, but be deeply involved in its production, I'm sure will recognize it's smell, the drug doesn't act that fast for her to not do something about it, and even if she falls for it she'll be on the known afterward, not a risk I will take, to be honest.
But yea, some well-placed words can get you some reaction, but I still don't think he will try something on her, not directly at least.
Have you never heard of parody before? in Japan, stationery is a somewhat big thing, with products having special cute editions targeted for woman, the gif is most likely a parody, "if you want to kill yourself, do it with one of our specialized knives, available in these cute colors" or something like that.