Like I said before, the relationship between Haru and Ellie really feels like a subtle one. He doesn't start out being madly in love with Ellie the moment they meet, but rather they start out as friends and over time realize they want to be more than that. When the new King accosts Ellie and makes her cry, Haru becomes enraged and vows he'll make him pay for hurting her. Before the final fight, Haru also says if he comes back he'll marry Ellie. I really like how the development works between these two, since unlike romantic comedy animes and manga, the romance between these two takes time to develop instead of just hitting us in the face with it from start to finish.