Following the strange girl seemed to be a fruitful endeavour, as she wandered into an alleyway, no doubt having spotted that she was, indeed, being followed. Odin had never called himself a good tracker, he most certainly was not. His skills lay elsewhere in the world of the underground. His magic turned him into a literal demon after all, staying inconspicuous had never been his best method of getting a job done. He much preferred to just get it over with by rushing through, and that was clearly evident as the girl turned around and asked, in a very timid voice, who was out there. At this point, Odin was standing at the corner of the street which entered the alleyway, having waited as he saw the girl enter, deciding it was best to not be seen as the only person in her view. Although, once he heard her timid voice, Odin stepped out into view. He had only followed the girl who had been talking about sacrificing hearts because it seemed like an interesting topic, and only two types of people really did things like that: fanatics and psychopaths: the Grimoire Heart mage was just curious as to which she was, but he said nothing, as the girl had only asked who was there, nothing more.