We first created EFD's about two years ago. We came up with the idea of two characters with the names of Lynn and Mogura. Creative, huh? Whenever a certain friend of ours would piss us off online, we'd turn efd and beat him up. The EFD's were originally a "sisterhood" with about 4 members, but soon only Mogura and Lynn remained.
What do EFD's look like??
EFD's have straight hair and dress in black robes (sometimes with flames at the bottom) They have Fangs, claws, and black wings. Pretty much all around average demonesses.
The connection between EFD's and Kasai's Cousins:
Lynn: Yes...there is..
EFD Fanart