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, 11 November 2012
Confirming something. My opponent targets my Ninja unit with A Stain Cleansed or similar action. Can I redirect it to a follower or Tsubute?
The Castle of Order
Text You do not lose Honor from Ninja cards you own. When another player's Battle action would target your Ninja: He is a master of the art of Ninjutsu. Once per battle, you may choose your Ninja at the same location. If you did, the action targets it instead, if legal.
A Stain Cleansed Cost * Text Battle: Choose your performing unbowed Magistrate, target an enemy card without attachments or an enemy unit, and pay Gold equal to the card or unit's total Gold Cost minus 2: Destroy it.
Jon Palmer (rules official), 12 November 2012
Confirming something. My opponent targets my Ninja unit with A Stain Cleansed or similar action. Can I redirect it to a follower or Tsubute?
The Castle of Order
Text You do not lose Honor from Ninja cards you own. When another player's Battle action would target your Ninja: He is a master of the art of Ninjutsu. Once per battle, you may choose your Ninja at the same location. If you did, the action targets it instead, if legal.
A Stain Cleansed Cost * Text Battle: Choose your performing unbowed Magistrate, target an enemy card without attachments or an enemy unit, and pay Gold equal to the card or unit's total Gold Cost minus 2: Destroy it.
Yes, as long as the new target still meets the conditions of the original action, it does not need to be in the same category.