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, 6 September 2007
regarding this: viewtopic.php?f=59&t=61344
The man doesnt ask if death after life triggers from the death of his personality, he asks if he can revive the personality who was destroyed, because he doesnt have any other dead personality in discard pile. The post o redirected only talked about when it could trigger.
Zen Faulkes (rules official), 6 September 2007
The man doesnt ask if death after life triggers from the death of his personality, he asks if he can revive the personality who was destroyed(.)
The first question in the oldest referenced post specifically says "one unit." I took that to mean there's only one possible thing to revive.
Will clarify.