RyuZU

Like her code name implies, she is an automata made to serve her master - in this case, Naoto. She is fiercely loyal to him, and should anything threaten him, she will retaliate with actions up to using lethal force. However, she will most often only use her abilities as a threat to deter any harm rather than escalate the conflict against humans. The same cannot be said for any automata or any humans who seek to destroy or kill Naoto or her sisters, as she demonstrates against Gennai.