Talk:Al/@comment-72.34.4.157-20200914193403/@comment-68.144.201.25-20201007082435

My theory is that he is Subaru's dad who was also isekai. There nothing saying that even if there from the same period on Earth that you will both be summon to the same time in the other World. In this case Subaru's dad was summon 18 year before Subaru was summon in this world.