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, 14 March 2012
In response to this: viewtopic.php?f=59&t=95860
If I target a 5F monk with a Ranged 5 attack and he overlays, does he still get the force penalty from Koshin Keep?
What about if I target the monk with a Ranged 3, and then another Ranged 3, after which the monk overlays? Does the new personality produced have a force penalty?
Jon Palmer (rules official), 14 March 2012
In response to this: viewtopic.php?f=59&t=95860
If I target a 5F monk with a Ranged 5 attack and he overlays, does he still get the force penalty from Koshin Keep?
What about if I target the monk with a Ranged 3, and then another Ranged 3, after which the monk overlays? Does the new personality produced have a force penalty?
No. These are ongoing effects, which only stick with the overlaid Personality, not the overlaying Personality.