The avians won't let me leave the great hall on the second level.

Hint 1 of 9:

One of the avians is offering you a gift.

Hint 2 of 9:

Take the melon.

Hint 3 of 9:

Maybe you could try eating it.

Hint 4 of 9:

You'll need to open it first.

Hint 5 of 9:

Use the knife on your multitool.