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.
A player, 28 October 2007
Seat of Power´s reaction reads: "Reaction: When an action would target one of your Unique Clan Champion or Daimyo Personalities: The action instead targets another of your legal Personalities with the same Clan alignment at his location."
When an action (for example Shiba Aikune XP 3: "Battle: Any number of times per turn, destroy a Personality in Aikune's army: Destroy two target cards opposing Aikune with no attachments.") targets two unique Clan Champions / unique Daimyo personalities, can this trigger the reaction on Seat of Power?
Martin Lund (rules official), 2 November 2007
Seat of Power´s reaction reads: "Reaction: When an action would target one of your Unique Clan Champion or Daimyo Personalities: The action instead targets another of your legal Personalities with the same Clan alignment at his location."
When an action (for example Shiba Aikune XP 3: "Battle: Any number of times per turn, destroy a Personality in Aikune's army: Destroy two target cards opposing Aikune with no attachments.") targets two unique Clan Champions / unique Daimyo personalities, can this trigger the reaction on Seat of Power?
Certainly. Heck, it provides two triggers for the ability. Of course, you can only use the ability once per turn, so choose wisely.