If the personality I targeted with this terrain becomes unopposed, does the personality still keep the +2 force?
The Eternal Rainbows
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 the personality I targeted with this terrain becomes unopposed, does the personality still keep the +2 force?
Yes. In this case "opposed" is a restriction on the targeting, rather than when the +2F kicks in, so he only has to be opposed to be targeted.