Expect Rukia to swing by and check up on her frequently, and give her updates too. If I remember right, Rukia was pretty deferential to Yachiru on account of her being a lieutenant as well as the president of the shinigami women's association.

Chrom will probably treat her like an adopted daughter no matter how tough she is, so you might get some good CR from Robin and Morgan too by sheer association if the players are cool with it!