A4 is a guard protogen. She is known for leading most of the protogen guards in training and she is a high class robot. She doesn’t take things easily as she is very rough and demanding. When she wants something she wants it now. She is a men slaughter. She can end someone in minutes. She is around 6,3 and is curvy. She was made in a factory like other protogens except she was made primarily and specially to guard and keep things in order.