There are a handful that he'd call off-limits, breeding-wise, but for the most part his roster is fully open — and I know he inherited whatever Eevees/Eeveelutions of Souji's that didn't get claimed, so those will still be on the table, too, of course. Happy to be of service!

And sure, we can definitely handwave that — how about if I hit Saber's new post and have Yagyuu say something to the effect of "the house is fine, I'm keeping tabs on it as you asked" and they can establish a further rapport ICly from there?