Keiko was a positive influence on Yusuke and the only friend he had since he was a child. And no matter how obnoxious he acted or how absent he was, she still cared about him immensely. Keiko did far more for Yusuke than Ginny did Harry as they grew up. No contest.
 
There's no location suitable enough to train her without arousing suspicion as far as actual combat goes. She'll learn through his teachings and apply it in engagements on small fry similar to the imp she encountered, with Kurama there to bail her out of any trouble she might find herself in. I do know what you mean though. The greenhouse is how she applies her spirit energy to see that she has talent in healing. Ironic for the 'reaper', no doubt.

<3

I'd like them to run into Kuwabara and Shizuru that weekend. Yusuke is still with Genkai at the time--or at least I would like to think he is, since he lost her recently and just wants to make the best of her presence back on Earth--so he'd be absent from town for a while. Since the two know of her true role, they can talk about the case. Kuwabara can express interest in helping them out by keeping his own eyes peeled at the school, since he is the acting 'top dog' until Yusuke returns. I agree with your other points. But to clarify: the day on the rp right now is Tuesday night, since the funeral was on Monday? Correct me if I'm wrong there. 

You wrote because you said you were inspired, but if the post was any good then your inspiration won't vanish the next day, and if it does you can reread it. Go ahead and get some rest if you need it. The rp isn't going anywhere, and neither am I. Don't push yourself.