This is a sticky situation that doesnt come up on here often. Ive seen this twice maybe. You need to contact a lawyer and get a consultation to see which path to take. Co-signers will get the bills. They arent the ones filing BK. The creditors will want their money. Thats why co-signing isnt advised for anyone to take on. They always get stuck with the bill. Good Luck!
It will report a positive as long as payments are made as if it was still yours. It will be like they are the only ones owning cause you'll be DC'ed from that debt.
The discharge does not make the debt disappear, however. The discharge applies to your liability on the debt, not the debt itself. The discharge is personal to the individual who filed bankruptcy. This means that if any other person was liable on the debt, such as a co-borrower or cosigner, that person is still responsible for the entire balance due unless that person filed bankruptcy with you.