Eubank is a sentient space dragon living inside Kazuko Yoshida when first met by MMFEC on a train from Osaka en route to a Mitsuhama lab in Kyoto.

MMFEC and Eubank first fight for control of the train, until they agree to get Eubank out of Kazuko Yoshida.

After Miss J agrees to, then actually manages to release Eubank in a delicate operation, MMFEC hand over to Mitsuhama the no longer infected (and no longer useful) Kazuko.