One fast question can somebody use the cards reaction without presence just like hamstrung? Reaction: After the resolution of an action that moved one or more Personalities to the attacking side at the current battlefield: Target and bow one of them.
Stand Down
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.
Yes you can.
Battles, Combat Segment: "Battle actions must follow the additional rules of Presence and Location. Reactions are not subject to rules of Presence and Location."