The 5th Legendary Hero

Naofumi Iwatani, shield hero, Motoyasu Kitamura, spear hero, Ren Amaki, sword hero, Itsuki Kawasumi, the bow hero, and Echo Kasumi, chain hero. Wait did you read right? Yes you did, Echo was the only female hero called to Melromarc as one of the legendary heroes. Unlike the rest of the other heroes she did have some idea of what had happened and had much information of the other heroes thanks to the fact she read the book before she was sucked in to this world. She's accepted like the rest of the heroes unlike Naofumi and she found it very unfair.. what would she do?