Could it be possible that Janus is Guile?
Since it is Another World, it could be a world where Janus didn´t get transported into 600 AD. Right?
Then Janus could have forgotten his memory or just tried not to think about it.
Then in Luccas letter she said "hes" right there reading this letter with her. So she could be talking about Guile right.
Tell me what you think...