This black cat is Felicia, her mother's daughter. Later, her father was caught by Jin He (the civet cat was in con air at first, but later escaped) and threatened by Jin He.
The next civet told Captain America's superhero formula, forced her to inject Captain America's superhero serum and turned it into an experiment and a black cat. But she can change back. And with the help of Spider-Man, a civet was produced, and the data of Captain America's superhero formula was deleted.
Extended data:
When Stan Lee, the father of Spider-Man, created this role, he broke the convention of naming teenage characters with the suffix of "boy" at that time and gave Spider-Man the name "Ren" as never before. From this name, we can see that Spider-Man has been endowed with the color of reform.
Stan decided to portray Spider-Man as an imperfect but no less than any super Englishman. This underage boy will become an independent hero, not an assistant to other adult heroes. He will have no experience and skills taught by any hero mentor. He will grow up alone, go on the road alone, and deal with the cruelty and absurdity of this world alone.