??
Ok sure
Hmmmm.... Then we keep our names by our sides because as you know, this one should be true to the flavor and killing happens, when Kira realizes the identity of that person. However, if we deduce that Kira is SK and Ryuk is mafia or vice versa and Kira finding Ryuk will give the ability to identify the name of the person by simply looking at the player (aka targeting the player) then it's gonna be hard for us. Remember, in this game as highlighted in the OP, Kira accepted L's challenge and killing the laatter is his prime purpose