For a cat whose body is completely black, you can consider the following names without black characters:
1. Rainbow: In sharp contrast to the black color of the cat, it means a colorful life.
2. Moon: The mystery of the black cat complements the beauty of the moon.
3. Xuanji: Symbolizing the jewel-like black cat, it gives people a sense of nobility and mystery.
4. Snowflake: The black cat is like a snowflake in the night sky, pure and beautiful.
5. Ghost: The black cat moves in the night, like a ghostly existence.