Kuro

Kuro Hantai (黒反対, Kuro Hantai, meaning "Black Opposite)" is Shiro's mischievous twin brother.

Personality
Kuro is a troublemaker who often ends up getting into trouble himself. When he found Shiro's portal and transported into Goiky, he started torturing the objects by using them as actual objects, since he didn't know at first that the objects were magical. When he first saw the objects in their human forms, he couldn't quite understand why they hated him. But when Shiro told him about how she realized the button was for a portal to Goiky, he eventually won back the trust of its residents.

Kuro is energetic, optimistic, and free-spirited. He also might share the same intelligence as his sister. Born adventurer at heart, Kuro can't sit still and is always looking for action. It is his outgoing personality and fearless curiosity that comes in handy when Shiro needs his help. Despite his ability to be able to look on the bright side, he can occasionally get his feelings hurt. Kuro avoids lying and is a terrible liar himself, often blurting out whatever it is about which he is trying to lie. He sometimes ends up in sticky situations, most of them involve the residents of Goiky. Still, despite all the weirdness he experiences in Goiky, Kuro is always a glass-half-full kind of guy. He is rarely angry or upset, and generally keeps a positive outlook. However, he has a selfish side, particularly when it comes to girls he's infatuated with, even breaking promises made with friends in pursuit of his crush. He has also shown to be self-righteous in his decisions which can be far from justified or accidentally backfire in some way. However, like his sister, he has the best of intentions and he will always try to choose the right options for himself and others.

Appearance
Kuro has black hair and green eyes. He usually wears glasses.