What's the name of this black cat, Detective Mister?

Mist Detective Black Cat is called Little Black Cat William.

William has many scenes, and he also helps the protagonist to do many vital things. In the game scene, there are many levels that Rex can't reach, such as climbing the shelf, which is very easy for a cat. There are some details that Rex can't communicate, such as talking to the cat family. With his connections, William succeeded in getting his family to hand over the props.

brief introduction

There are many games that Rex can't finish alone. William will be sent at this time, and people and cats will work together to complete the organ and defeat the enemy. William the black cat is very clever. He can understand the languages of other cats as well as people. As a cat, not only brave but also flexible, it is an indispensable partner for the protagonist to explore the truth!