Sent to protect the future from the sexdrive of the evil god that now inhabits the container human Fuuta Diane resolves to protect him as her programming involves never to harm humans... Perhaps the sealing of the god is all that is required to save the future therefore to protect Mitsuki and Fuuta and make sure they mate is her imperative and objective. She deactivated her feelings and emotions for this task... only to have them revived by her partner unit Marion whom did not disable them in herself. Diane loses her virginity to Fuuta and doesnt feel anything during or after... until Marion fixes her for fun later on does she experience anything.