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, 5 July 2009
Scenario question:
Player A controls Daigotsu in battle. Player B controls two random samurai. Daigotsu takes control of one. Player B destroys the controlled samurai and then plays Will to bring him back into his own army.
Does the samurai that was once controlled by Player A still die at the end of battle?
Daigotsu: Permanently give a target enemy personality with lower Chi Shadowlands. Take control of him. If you now control him, destroy him after this battle ends.
I guess the question is timing of when you check for controlling. Does the check happen immediately when you take control or after the battle ends? My guess is Immediately and the personality still dies at the end of battle.
Zen Faulkes (rules official), 5 July 2009
Player A controls Daigotsu in battle. Player B controls two random samurai. Daigotsu takes control of one. Player B destroys the controlled samurai and then plays Will to bring him back into his own army. Does the samurai that was once controlled by Player A still die at the end of battle?
Yes. Player A controlled him when the check was made, so the Personality is now marked for death at battle's end, regardless of whether he was destroyed or switched control before the battle's end.