Dr. Asakura created an illegal android named Naomi, who is a third type android with unique abilities that set her apart from other androids. She refers to him as her "father." After joining the Mars Police Department, Ross Syllabus became Naomi's partner. Third-type androids are known for their human-like appearance and capabilities, which make them indistinguishable from humans. They have been living among humans for some time without anyone noticing the difference.