Can you ally with both the Defender and the Attacker as there are a number of cards that could play off each other if you are on both sides, also it would seem to be in the character of some clans to do this as well (Scorpion)
Allying
A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
Can you ally with both the Defender and the Attacker(?)
No.