« Labrys Revealed as Newest Addition to Persona 4: The Ultimate in Mayonaka Arena's Roster, First Look at Color Customization »
According to Andria Sang, Famitsu revealed Labrys to be the newest character to join P4:UMA's roster. Details about the character are sparse but she is the second mech-girl in the game and you can check out some screenshots of her in the gallery below.
Beyond that, they released a few screenshots of the color customization mode as well. There are eight color variations by default but the remaining six can be unlocked by using the player's guild in-game currency that you earn by simply playing the game.