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, 3 July 2007
if a personality were to die in battle resolution can i use empress' address
Political Reaction: After one of your Personalities is destroyed while in a defending army, bow one of your target Courtiers or Empresses: Target a non-unique Personality with your clan alignment in your discard pile. Bring him into play in your home, waiving all costs. Gain 2 Honor.
Martin Lund (rules official), 3 July 2007
if a personality were to die in battle resolution can i use empress' address
Political Reaction: After one of your Personalities is destroyed while in a defending army, bow one of your target Courtiers or Empresses: Target a non-unique Personality with your clan alignment in your discard pile. Bring him into play in your home, waiving all costs. Gain 2 Honor.
Yes. There are armies during Battle Resolution, and cards destroyed in Battle Resolution are destroyed as part of an Army.