Your response seems to skip over exactly the distinction that the parent comment was making. The LLM itself may not have memory or capacity to learn, but the fictional character created by the LLM does. (See also: in-context learning.)
But the fictional character doesn't subsist between sessions. You sound like you want the fictional character to be Clippy, who you level up like a video game through multiple sessions.
To me, context doesn't last long enough in an llm to make in-context learning worth it
