[Instinctively tenses up when Subaru approaches, although he can tell that Subaru obviously means no harm... He makes his shoulders relax a little, but when Subaru reaches out, touching at the dagger, his first thought was to shy away from the touch, a strange sense of possessiveness flaring up in him before he quickly smothers it. Well, that was weird.]
[And the words register and he looks properly surprised]
Oh-- [a brother. That's who Kamui was looking for, then. Just a brother...] Kamui.