Scarlet
From Shin Megami Tensei IMAGINE Wiki
In PVP there are two sides. Scarlet and Azure which oppose one another. Scarlet seems to be a more chaos (aligment) filled while Azura on the other hand is filled with more law players. (This however is questionable.)
This team aligment is ONLY available in PvP and will not matter in game, or around game. (It is not like in game aligment) and does not and will not affect the players ability. It is just the team you are selected to play on till the completion of the match.