The Strongest Jet Eye user in the SFD. Her code name is Refractor, and her ability allows her to manipulate her own refractivity. In other words, she can become invisible to others by circling light around herself.

Spoiler

Suu also has the ability to see the sight lines of others. This ability caused her immense grief after seeing the sight lines of men turned towards her with the color of desire, causing possible misandrophobia within her and contributing to her shy personality.

Spoiler

She later opens up to Minoru, putting her trust in him due to his sight line's purity towards her.

(Source: Yen Press)