How do I operate the window of memory?

Hint 1 of 7:

The controls are behind a piece of glass.

Hint 2 of 7:

Have Wolfy punch out the glass to get to the button.

Hint 3 of 7:

Blount can then press the button to revisit all of the major characters from
earlier in the game.

Hint 4 of 7:

You're looking for one who might be able to give you an item.

Hint 5 of 7:

Listen to the descriptions of them people as you look at them for a clue.

Hint 6 of 7:

Colossus has a grain of sand in his eye.

Hint 7 of 7:

Wolfy can get it out by hitting the picture.