For me, it's Towa.
In her first two games she is a student of Thors Military Academy. As Erebonia is rather rigid in terms of social hierarchy, students are divided into three categories.
>Nobles (white uniforms)
>Commoners (green uniforms)
>Class 7 (experimental mixed class, red uniforms)
Towa wears the green uniform, which complements her eyes!

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Our HEROES!