Fuyu and Haru's biographies:
Fuyu is a Hero who wearing a blue marble fox mask. She's very cold, hot-tempered and anti-social person, nobody want to befriend with her except for her twin brother Haru. She's can get irritated so easily and will kick anybody's ass if she's REALLY pissed. Despite this all, Fuyu is quite caring about her twin but also abusing him at the same time. Her good attitude is sane, caring and smart.
Haru is a Hero who wearing an orange marble fox mask. Unlike his twin sister, he's energetic, friendly and blissful. However, he's also quite emotional and clumsy. Haru is very sensitive about being insulted. He doesn't like the world due it's really grey and dull, so he tries to blind it all and imagines everything's positive n perfect.