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.
Do Daigotsu XP2 and Daigotsu Hidetsugu have to be at the battle to use their ability?
Daigotsu XP2
Battle/Open : Even if Daigotsu is bowed: Straighten a target Shadowlands Personality and bow or straighten a target Shadowlands card.
Daigotsu Hidetsugu
Battle: Bow or straighten a target Shadowlands Personality.
Do Daigotsu XP2 and Daigotsu Hidetsugu have to be at the battle to use their ability?
http://rules.l5r.com/Battles#Combat_Segment: "If a Battle action is on a card in a unit (a Personality or attachment in play), the unit must be at the current battlefield." Yes.
(Fixed.)