I'm a fan of this fictional character -- a huge fan -- and I'm really in love with him. But he's portrayed by an actor -- an actual person. My question is: If I daydream just about the fictional character, is it a sin? I mean, I'm not thinking about the actor himself, but it's just impossible not to have his face pictured, right? What's your opinion?
It would depend on what you are daydreaming about. Are you daydreaming about being a part of the story or are you imagining yourself having an affair with him? Daydreaming about sin is still a sin. "For from within, out of the heart of men, proceed the evil thoughts, fornications, thefts, murders, adulteries, deeds of coveting and wickedness, as well as deceit, sensuality, envy, slander, pride and foolishness. All these evil things proceed from within and defile the man" (Mark 7:21-23).