If I use Rapid Deployment to being in Yoritomo Eriko (xp) and some other personality, would I be able to use Eriko's reaction?
Eriko and Rapid Deployment
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.
If I use Rapid Deployment to being in Yoritomo Eriko (xp) and some other personality, would I be able to use Eriko's reaction?
Yes, indeed.
Eriko's Reaction triggers after the movement. At that point, both Personalities are at the battlefield, so it is "Eriko's battlefield" as her Reaction trigger requires.