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.
Player A plays Shuten Dojis Fury targeting three heros of player B. Can player B play Take the Charge to redirect the action to one of the other originally targets and thus change the number of targets for the action?
How would the situation be, if a samurai and a shugenja are together in an army and targeted by SDF. Could I play Turn of Fortune to have only one of then bowed?
Player A plays Shuten Dojis Fury targeting three heros of player B. Can player B play Take the Charge to redirect the action to one of the other originally targets and thus change the number of targets for the action?
Take the Charge says, "Heroic Reaction: When a Battle action would target one of your Personalities: The action instead targets another legal Hero Personality of your choice that you control."
Shuten Doji's Fury can not target the same Personality more than once. So a Hero Personality who is already Target B could not qualify as "another legal Hero Personality" for the purposes of being Target C.
Also, remember that targeting another legal target is the exception to the regular rules about "instead."
EXCEPTION: In effects that substitute targeting, if the new target has to be a "legal" target, then failure to find a new legal target -- one that satisfies the requirements of the original targeting plus any additional requirements on targeting from other sources -- means the original targeting happens normally. [ADDED 24 Sept 2007]
So unless you can find a legal Hero Personality who was not one of the original 3 targets of Shuten Doji's Fury, you can't get anywhere with Take the Charge.
The same thing goes for Turn of Fortune.