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, 21 June 2015
if a card says your on it, it is referring only to the person who played the card correct? Including terrains like Walking with the Water?
Water Absent Battle: Destroy a Terrain (if able). Put this Terrain into play. If he would be opposed, move your target Personality at any location to this battlefield. You may straighten the Ring of Water.
Alex Jones (rules official), 22 June 2015
if a card says your on it, it is referring only to the person who played the card correct? Including terrains like Walking with the Water?
Water Absent Battle: Destroy a Terrain (if able). Put this Terrain into play. If he would be opposed, move your target Personality at any location to this battlefield. You may straighten the Ring of Water.
Yes.
See Perspective.