Card Lores:Lonely Stealth Fiend, Kumiko

In her former life she was a girl who would put down other people's feelings, as such she became greatly feared and hated. After joining the Nubatama clan, she continues to destroy one's emotional state until they're left weakened to the point of no return. She focuses on enemy deterioration in the Dragon Empire, to destroy the enemy's will and finish them off in the battlefield.