“The alternate, pandimensional Closers have come over to our world! After a brief (but heated) debate, the Closers are turning to their peers to settle the score! Players will be able to put in a vote every two days in two different polls, culminating in the announcement of the best boy and girl. Once voting has ended, every player will receive a code for a free in-game poster, featuring the winners, that they can place in their housing areas.”
Do note that the Pandimensional skins are free; you just have to manually change your character skin to grab them. They’re available only through April 2nd.
Source: Official site, press release