The other 60% of second generation children gain a 'Unique' quirk, which can often be the same as a quirk that has been seen before. This pattern has followed with the third, fourth, fifth, and even the recent sixth generation quirk users. We know next to nothing about these parasites, and experimentation on children is obviously not okay, so trying to capture a parasite before the fusion is incredibly difficult. Most of the world, roughly 80% of the world has quirks these days. We have to wonder, why do these parasites do what they do? what do they gain from the process of giving people powers?"