It is a known fact that Kuroneko wears contact lenses to make her bluish eyes seem red. Her younger sisters, Hinata and Tamaki, as well as her mother worry about Ruri when she's in her otaku mode. She does, however, wear normal clothes when she's at school and takes care of her sisters when she's at home.
Cute cosplay from Winter Comiket 2010! I really like her gothic attire, with or without the ears. Thanks to Miki for sending this!