@fairymoonshine It depends on the plot, I guess? If the mc is fem Percy or fem Harry or both or she is another character, I think the love interest should be someone powerful and understanding because in both worlds, a lot of people will be bashing so the mc needs someone who can protect her, there is also the matter of the godly parent that has an effect on mc role and power as a witch and demigod ♡
In my opinion, it would be good if the love interest and godly parent be one of the 12 Olympians or even primordials:)