Voiced by: Ayana Taketatsu (Japanese); Jad Saxton (English)
A white-haired two-tailed humanoid nekomata raised by a devil, Shirone (??) has to witness her master being killed in self-defense at the hands of Kuroka, who becomes a stray devil. Sentenced to death for her crimes, Shirone is rescued by Sirzechs Lucifer and Rias takes her in, giving her the name Koneko Toujou (?? ??, T?j? Koneko). Koneko eventually becomes a first-year student at Kuoh Academy. Issei describes Koneko as petite with a loli-face, a mascot character admired by both boys and girls. Her position in Rias's group is the rook, where she withstands crushing forces and can throw heavy objects with little effort. Although she is quiet and cool-headed, rarely showing emotion, she is often irritated with Issei's perverted tactics. Her familiar is a small white cat named Shiro (??). Ishibumi discussed Koneko's identity with his editor but it was not fleshed out for over a year until Volume 5.