~Can she drink blood from your character? She's welcome to try, but I can't promise she'll succeed. Not to mention Angel blood will probably react differently than human blood. We can chat, if it comes up.
~Can she transform into your character after drinking their blood? No.
~Can Diva give your character her blood? Given that Isabelle is Nephilim already, I don't think it would do much; I'll lean towards no.
~Is there anything that you want me to avoid talking about? Nope, go right ahead with anything. I'll let you know if something comes up, though.