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, 13 February 2008
Lion Mempo Reaction: After a Personality in this battle is destroyed: This Personality copies a Battle action on the destroyed card (until the turn ends) and may take an additional battle action to perform it.
Ruined City Your Spider Clan Personalities have the ability, "Battle: Bow a target unit with zero total Force or with the lowest non-zero total Force (including ties) among all units at the current battlefield."
I have two Spider clan personalities at a battlefield, one of which has the Lion mempo attached. If the non-mempo'd personality is destroyed, can I use the mempo to take the Ruined City battle ability on the destroyed Spider personality?
Zen Faulkes (rules official), 14 February 2008
I have two Spider clan personalities at a battlefield, one of which has the Lion mempo attached. If the non-mempo'd personality is destroyed, can I use the mempo to take the Ruined City battle ability on the destroyed Spider personality?
http://rules.l5r.com/Effects#Effects_in_and_out_of_play
No.