[Guido]

Thanks to Omniscient for the following:
http://randomc.animeblogger.net/2006...n-no-shana-13/

Spoiler:

The thirteenth episode kicked!!

Shana gets at last payback against the incestuous twins, kicking major butt.

Yuuji had a close shave against Shuudonai.

Shana got unwilling help from an unlikely (mis)ally.

Keisaku and Eita proved that they too can be of useful help.

Shana has declared all out war to Kazumi for Yuuji's love; she's not feeling guilt about it while Kazumi's left in tears, yet her resolve won't bend either.