Mono

Mono is an original character made for Grand Cross mobile game. She is a member of the Seven Disasters.
Mono is an artifical human created exclusively for combat and murderous purposes, with her entire life being resumed on training, fighting and killing. Her creators appearently made her to live at the behest of others, as the own Mono mentioned after being summoned by Eastin that she lives to 'follow orders'.

After Lilia gets caught by Merlin, she is summoned by Eastin and Valenty to help them rescue the mage, the Human Weapon initially refuses and attacks the two Disasters, however, after a brief battle, Eastin and Valenty convinces Mono to help them after the latter convinces her to join the group to find a new purpose on life now following her own desires.