Will there be an anime to Kyoukai no Rinne?
As of yet no. But telling by Ms. Takahashi's previous works, I
expect that an anime will be in the works after about the 12-14th
Manga volume is released in Japan. Now, I believe they are on
volume 10 in Japan and volume 7 in America. Several of her previous
works were animated after the 9th volume and one after the 7th
volume, but that left large gaps which were filled with, well,
filler episodes.
Another thing, Inuyasha was animated only after the 18th volume,
merely because it was a series that followed a plotline. The rest
of her works are mainly comedies and are very episodic in nature,
consisting of very short arcs of three of so chapters of random
fun. Which means it made it very easy for filler episodes to be
added, unlike Inuyasha, whose arcs (Notably the Band of Seven arc)
Could take up several manga VOLUMES, and made it very difficult to
insert filler episodes (also for fear of messing up the plot.
Kyoukai no Rinne (Rin-ne) is a comedy, and again, very episodic, so
I suspect it will be animated much before the 18th volume.
This is more of an educated guestimation, so don't take this
answer for the absolute truth. I am a bit of Rumiko Takahashi
Otaku, so I could not leave an answer as simple as four words.
Thankyou for your time.