- Cant Un Hear It:
- Many fans have stated that they keep hearing the voice of Crispin Freeman whenever Asmodai speaks. Rather fitting considering his vampire theme.
- Many fans also claim that Royce would posses a voice similar to Tim Curry or Jim Cummings.
- Word of God states that if Syranon had a voice actor, it would be Johnny Yong Bosch.
- Ensemble Dark Horse: Ame is up there, but a lot of fans thus far have made Teodora, Lutz, Slade, and Royce equal to her as the big favorites.
- Evil Is Cool: Royce exemplifies this.
- Ho Yay: Let's face it: Ame totally wants to get in Ryo's pants. Word of God agrees.
- Nightmare Fuel: Imagine that you are helplessly watching your sister be brutally injured and delimbed by her demonic father. Then imagine him Mind Rape her with the help of satanic magic in almost an instant. Then imagine that very sister run towards you, sporting an insane grin on her face before shoving her hand through the back of your head. Sweet dreams.
- Tear Jerker:
- Remember when Ame was mindcontrolled by Royce so that he could make her brutalize her own sister Suko? That in itself was pretty bad, but what makes the situation even worse is that Suko has not forgiven Ame for it. Only time can tell if the remade chapters will make this situation better or worse.
- Another from History Of Nifelheim, the prequel of HeartCore. After being mortally wounded by Royce, Lilium begs to Asmodai to take care of her daughter, wanting her to be safe from her father. She dies shortly after as her Heartcore turns into the child that would later become Ame. To make matters worse, Asmodai had an unrequited love for Lilium, having never admitted his true feelings for her, even in her dying moment.
YMMV / Heartcore