I think the most rumored couples are the following:
1. Nakahara Mai X Shimizu Ai
2. Nabatame Hitomi X Itou Shizuka
3. Kawasumi Ayako X Noto Mamiko
I kinda believe the first one. After all, they kissed each other in the Strawberry Panic ED @#!@#%!$@! (so talking about the Tamao X Nagisa...)
For the 2 and 3, I think they are just close colleague appearing in a lot of series together, like Shana...
Quote:
Originally Posted by Kinny Riddle
Well, if you believe the claims by Nabatame that she has plenty of "relations" with all sorts of female seiyuus, you could say the "chemistry" is more than natural. 
http://kurogane.animeblogger.net/
I think Kurogane of the above blog has a post mentioning about seiyuu yuri, but I can't remember where, either ask him or find out yourself.
After reading volume 10, the second prequel, I'm feeling very sorry for Wilhelmina's unrequited love not coming to fruition.
In the flashback episodes in the first season, we can see this relationship (confirmed in the novels as well):
Alastor <---> Mathilda <--- Merihim (Shiro, Shana's skeletal mentor) <--- Wilhelmina
(This is also why Alastor does not comment or object to Shana's feelings, since he's been there before)
So she might as well be better off with Margery.  |