Aww yay, that's great! That you got him to join, I mean, not that Akia left him behind. ^^; Yup, a summon command is a good idea - I might even get a chance to add that in this evening. Still, I'm a lot more puzzled that Akia didn't teleport him back - she should have. O.o; Did you notice anything off?
Oooh, and since your brother joined - one of you could play as a priest (healing) and the other one as a warrior (fighting)! Once you are around level 12 or so, you could give the dungeon in the East Caves a go (the same place where you saved Jianna's pet rabbit, except that you keep going down). It might have a surprise down there, who knows. >3