It's all good I'm actually not very familiar with DR, but based entirely on your description of Ishimaru I've thinking that he's basically the male version of Keiko only slightly more stick in the mud (or exactly the same amount depending on who you ask). I was on vacation when you last had him post otherwise I totally would have had her tag in for fashion advice and minor ego stroking because someone who understands the importance of wearing the proper uniform.

I don't have anything particular in mind atm, since most of her immediate plans have to do with getting to Azalea and potential egg babies. But I feel like they'd be likely to bond of school stuff or woes of being involved in student leadership at their schools.