@Sep10trion,
not really. Chocolate is poison for humans too, they just have to ingest more of it, than cat or dog. Humans need about 5 times ammount of theobromine for the same result, but that still poison nevertheless.
By the way, it's called "theobromine poisoning", to get even slightest signs of poisoning, cat need to consume about 100 mg of theobromine on 1 kg of the weight of the cat.
Those looks like sweet milk chocolates, those would be about 150 mg of theobromin per 100 g of chocolate. So if that catgirl weight about 40 kg, then she need to consume about 2,6 kg of chocolate. She will get stomache ache long before "theobromine poisoning" lol
And even if those chocolates are highest concentration of cacao (which is not), they still have not more than 1400 mg per 100 g. So, for the first signs of poisoning, she needs about 290 g of ultra-dark chocolate. Those 3 little things isn't going to do ANYTHING.
tl;dr - it's all about ammount of consuming proportionally to consumer's weight. That catgirl weights much more than normal cat, and those 3 small candies are too small to do anything.