In the last plot of Onion Knight in Dark Souls 3, we need to go to the underground prison to rescue him, but some players have encountered the problem of finding Onion Knight not in the cell in the past. This may be because we have not completed the previous task, or it may be due to cell exploration. Caused by not enough.
1. The task is not completed
1. If the Onion Knight is not in the cell, it may be that the previous mission has not been completed.
2. You can confirm first. The second step after the first encounter is to rescue him in the well. After the rescue, go to the sewers of Cold Rift Valley to talk to him. If you miss a step, he will not be in the cell.
2. Not enough exploration
1. If you confirm that all the previous procedures have been completed, then it may be a problem with the underground prison.
2. We can complete all the tasks in the underground prison first. After unlocking it, we should be able to encounter it when we come back.
ps: If none of the above methods can solve the problem, it may be stuck. You can try restarting the game.