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, 26 January 2011
There's a battle at province #1. Defending player takes a Battle action. I have Bauyshi Muhito exp 2 at home. Can I move him to for example province #3 ? It seems that nothing prevents that, but I need that formal "yes" or "no", since it looks like a move that many players will argue about.
Relevant text: Reaction: After the resolution of another player's Battle action: Move Muhito to a different location.
A player, 26 January 2011
Yes, Muhito's Reaction can move him to any different location.