One of Umehara's Shikabane Hime is Flesh Backbone, who is as much an otaku as Umehara himself, although the two can have even more passionate arguments than normal Makina and otaku Keisei would have had over conflicts on two-dimensional vs. three-dimensional or doujinshi vs. figurines. In fact, she was a foreigner who had died in a plane accident on her way to Akihabara.