Well, it depends. Sometimes series claim to be based on true stories but take creative liberties. For 'Eric', you'd have to research or look for official statements to know for sure.
In fact, Eric is not based on a true story. It's a fictional creation by the writers to engage and captivate the audience through imaginative plots and characters.
I don't think so. Series like Eric are often crafted from the minds of writers and may incorporate fictional elements to make the story more engaging and unique.