Sachi and Yuyu

and are Kohikaze Sora and the Kohikaze family's twin pet calico cats. Both are voiced by Misawa Sachika.

Appearance
Both cats are calico cats, having most of their fur white with large patches of orange and black (or cream and grey in Yuyu's case).

Sachi's orange patches are located around her right ear, on her tail and around her right leg while her black patches are located on her underbelly and her back. She also has a black stripe on her left ear.

In Yuyu's case, she is much paler in patch colours, having cream and grey patches - not orange and black while there is a smaller amount of white on her body unlike Sachi. Her cream patches covers most of her body from the top halve of her head to around half spine point and her paws while her grey patches reside on her tail, her chest and a large patch residing on her underbelly.

Personality
Both cats are fairly affectionate, sweet and loving yet also have their own differences in personality - Sachi being the more adventurous and high spirited of the two and Yuyu being timider and more of a watcher, tending to watch her older sister's actions.

Trivia

 * According to Sora, Sachi and Yuyu were given to her and Miku as birthday presents when they turned 14 - Sachi immediately being attracted to Sora and Yuyu being immediately attracted to Miku.
 * Their names mean "happiness" and "dream" respectively.