How do Lennie's actions in Of Mice and Men present him as a character?refer to how he imitates George and how forgetful and child like he is

We see several examples of how Lennie tries to be like
George, from the various points where he repeats what George says right after he says it
(cussing at the bus driver, for example), to how he tries to work hard, follow George's
rules and generally please him. It's very clear that not only does Lennie look up to
George, he looks at him as a father or brother
figure.

Lennie is, in fact, a child, at least mentally and
emotionally.  He is not capable of maturing.  He has issues with his memory.  George has
to tell him over and over about the rabbits, not only because Lennie likes the story,
but because he forgets the details all of the time.  Steinbeck makes it very clear, from
the beginning, how dependent Lennie is on George, and we get the uneasy feeling that
even with George looking out for him, it's not going to be
enough.