Thinking about it, it's odd how Sumika's started to gain the trait of songwriter since she wrote Kaku and L&J. For the latter, she even designed the costume and dance moves. I may be wrong but the only other person who has done so is Sena (Our Chant). It's interesting since she seems to be the only one really going for this "Self creator" route. She also has the "Producer/Trainer" route which Saki and Sena are going through.

With how she also used to be world class in ballet, Sumika feels like she'll end up being the strongest idol in the long run.