Enrico Pucci's obsession would likely manifest in a single-minded focus on the person he loves, with little regard for their autonomy or well-being. He might go to great lengths to isolate them from others and ensure their undivided attention, using manipulation or even coercion if necessary. His possessiveness would lead him to see anyone else in the object of his affection's life as a threat, leading to jealousy and potentially violent reactions.