What are some symbols (items) that make a person different and unique from everyone else--like Holden's red hat?

Holden uses many symbols to show that he is stuck in the
past or wishes he were dead:

Things Frozen in
Time

1. Allie's red hair & the
broken window in the garage

2. Allie’s grave (doesn’t like
visiting because of the rain)

3. Museum of Art: never
changes

4. Eskimo is mummified
forever

5. Frozen pond in Central
Park

6. Fish trapped
underneath

7. Ducks forced to be moved
elsewhere

8. Essay about Egyptians (mummies) written for
Old Spencer

Child-like
Things

1. Jane keeping her kings in the back
row (checkers)

2. “Catcher in the Rye”: rescue kids from
falling

3. “F#@K”: tries to erase
it

4. Elmer Fudd-like hunting hat; red like Allie’s bright
red hair

5. Allie’s glove with the poems written all
over

6. “Little Shirley Beans” – record he buys
Phoebe

7. Carrousel – Holden watches it go round and round
(never progresses)

8. Ducks in the lagoon: wants someone to
rescue them

Violent
Things

1.  Cannon on top of Thomson
Hill

2.  Red Hunting Hat

3.
 Blood after Maurice, Stradlater beat him up

4.  James
Castle (J.C. symbol of Jesus Christ) - his dead body after he committed suicide by
jumping out of a window

5.  Allusion to Mercutio's dead
body (stabbed to death by Tybalt)