Zeke was the descendant of the Devil, there was no doubt about this fact in Eiro's mind. However, from the way that Zeke was acting, it didn't seem as though he was pretending, or knew anything about who Eiro really was. In that case, even if the Devil did place him here, then it wasn't just to get someone close to him. More importantly, there was no way that the Devil thought Eiro wouldn't be able to figure out who Zeke really was. Eiro was pretty sure that the Devil was aware of what Eiro could do, more than anyone else.
However, it was also possible that this was the ploy of a higher power. Not of a god of course, but the strings of fate being pulled behind the scenes. Either way, there was a reason why Zeke was here, Eiro just had to figure out what that reason was.
Though, there was one thing that he knew already; with Zeke's appearance, it was more than just clear that things were moving closer to the point at which Eiro and the Devil would have to fight.
