From GARO: Makai no Hana.

Exta: エクスタ
http://i.imgur.com/depiUF7.jpg
An one-eyed spider-like Horror that is one of the nine Horrors freed from the slate that sealed Eyrith. Once freed, Exta assumed the form of a cat before entering the body of a shabby and old homeless woman after sensing her inner darkness. Altering her host to look youthful, Exta uses her power to assume the form of an object to ambush her prey. While she is a decent fighter, Exta mostly ran from Raiga and Crow before fighting the former in her true form before being sealed by Mayuri once congregated into a stone.