"So what is the distinction that you feel that there should be between father and brother?" Ishiah asks, frowning slightly. He's genuinely curious, at this point. There are ways in which he addresses and protects his peri brothers back home that Rin might qualify as being overly paternal.

But admittedly, it's hard to picture a human carrying that same approach and tone at such a young age. Between the Okumura twins, it feels like there's a difference of years as opposed to hours, for more reasons than the physical.

Before Rin has a chance to answer, Ishiah looks up with a thought. "Do you think that he may feel strongly about being a father to you... because he has a certain opinion of the father you shared? I doubt he treated both of you similarly."