I recommend that you just play through the Kitsune den and form your own opinion, instead of relying on the opinions posted in this thread. A lot of people in here hold years old grudges and this colors their perspective on not just the Kitsune but on CoC2 as a whole.
Elsewhere, Kiyoko continues being one of the most popular characters, and for a good reason. Kohaku is also insanely popular, and so is Rindo.
The backlash in here against the Kitsune is IMHO overblown due to a lot of people in here having a personal beef with the guy writing them, the source of this anger being past drama and the fallout from it that happened all the way back when CoC1 was still being worked on. They claim that the writer created Kinu specifically to "troll" them.
But again, instead of believing either side the best course for you is to just play through the Kitsune content and form your own opinion.