While cats can't comprehend complex concepts like personal growth or changes in personality in the way humans do, they are remarkably perceptive creatures. Cats are highly attuned to their human's behaviors, routines, and emotions. They can notice subtle changes in your actions, tone of voice, and overall demeanor.
Even though your cat may not understand the concept of personal growth or the passage of time, she likely perceives you as a familiar and constant presence in her life. Cats are creatures of habit and tend to form strong bonds with their human companions. To your cat, you are likely a source of comfort, affection, and familiarity.
As you've had your cat since you were four years old, she has witnessed your development over the years. She may have observed changes in how you interact with her, your daily routines, and the way you handle emotions. Cats are known to be sensitive to emotional changes in their owners, and they often respond accordingly, such as providing comfort when they sense distress.
While your cat may not consciously think about how you were different in the past, she probably appreciates the love and care you've provided throughout her life. Cats tend to form deep bonds with their human companions, and your relationship with her is likely based on trust and affection, regardless of any personality changes you might have undergone.