This cube craft paper toy is Kuro, a Cat Sith and Rin Okumura's familiar, based on the manga Ao no Exorcist (Blue Exorcist), the papercraft was created by duver14. Kuro was once the familiar of Shirou Fujimoto.
As a cat, Kuro is very playful and energetic, as he is constantly seen around Rin, asking him to play with him. However, he does have a fierce side to him, as shown when he attacked the humans bulldozing his shrine. He loves Shiro's catnip wine.
Kuro is a black cat with two tails. The lower half of his face is covered with chocolate-brown fur, which slopes upward between his eyes, while his chest fur is white. There is a small patch of white fur on his right foreleg. He has large, yellow eyes with black pupils, as well as small horns on his head. When Kuro goes into his nekomata form, he becomes enormous, easily towering over human adults.
Kuro has the ability to change from a small cat into a nekomata, a giant demon cat, at any time. With this change, Kuro grows to an enormous size and gains immense strength and power. His strength was so great that he was able to topple bulldozers and other construction equipment easily. [Source: wikia]
You can download this cube paper craft toy here: Ao no Exorcist - Kuro Cube Craft Free Paper Toy Download