An android built in the image of the deceased granddaughter of Kyusaku Natsume's mentor, Eimi is emotionally, mentally, and physically unstable. Built in the image of a girl around Ryu's age, Eimi's activation resulted in an explosion that killed her grandfather leaving her legally the property of Akiko's company. Suffering from multiple sources of psychological trauma on top (or maybe because of) of her faulty design, Eimi's single fixation is taking Nuku Nuku's body for herself. (Eimi's own body doomed to detonate if pushed beyond its limit due a faulty or perhaps non-existent cooling system.) Eimi openly admits she has no idea how to download her OS into Nuku Nuku's hardware (not knowing Nuku Nuku's brain is biological and not software driven like Eimi's own), but is driven by a lack of a better plan and a superiority-inferiority complex she suffers from Nuku Nuku. Nuku Nuku for her part would love nothing more than to be Eimi's friend. Eimi admitted to having feelings for Ryu, but brushed off her own emotions as meaningless since like everything else about her is just a software parlor trick, and wrote an apology to Ryu for feeling such 'fake' emotions towards him. A drama queen and an irrepressible hot-head, Eimi is able to think ahead and be clever but often lets her own impatience get the better of her.