Characteristics are handled differently in HikaShop CSVs so you won't be able to import them direclty with the current import.
Instead of having the characteristics on one line and then defining a way of separating them int he same column as they do, hikashop uses several lines like that:
product_code;product_parent_id;color;quantity
product_1;;blue;
variant_1;product_1;blue;12
variant_2;product_1;red;10
variant_3;product_1;green;20
That means that there will be a need for converting from their format to hikashop's if you want to import the CSV the the hikashop import feature.
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The import system of HikaShop use that principal. When a product already exists based on the product_code, it is updated, otherwise, it is inserted.