In Magnify Hero, you can move your finger around and summon sparkles the same color as the Hero’s element (e.g. red for Fire Heroes, green for Nature Heroes, pink for Dark ones…).
The thing is, that’s all for interactive elements, as the sparkles are purely cosmetic.
So, I think it would be awesome to add some physical interactions with one’s Heroes, a la Pokémon-Amie. You know, touching faces, touching hair, touching the body, and watch the characters’ reactions from it.
This would make them feel much more real.