Volume 12 (on spine of the manga)
Kinddara Guivelostain is a female Shinigami.
According to Death Note 13: How to Read, she has a "fierce appearance," having stitches on her head and sharp teeth. She also has bone-like protrusions all over her body.
Kinddara Guivelostain enjoys being violent and dislikes thinking. She does not appear in the actual Death Note story, but she does appear on the spine of volume twelve. Takeshi Obata said that since the final volume release pended, he wanted to create a new Shinigami to appear on the cover.