From J Devil's official Facebook page:

"Have you cast you vote for your favorite J Devil Fan Art? Click the link below to cast your vote! J Devil will select the winner from the 10 with the highest votes! Voting will only be open through 4 July so hurry up and cast your vote! Only 1 vote per person. "Likes" on a photo are not votes. You must use the voting app to vote!"

Click here to vote.