How does the game decide which epiphet to give a character?

[SSJVegetaTrunks]

Does in just use the one that he earned most recently, or is there some order of priority?

Also, can Agents and Admirals get epiphets?

EDIT: Off topic question about trait triggers. In:

;------------------------------------------
Trigger testingpostbattle
    WhenToTest PostBattle

    Condition Trait GoodCommander >= 1

    Affects Drink  2  Chance  100

When it says "GoodCommander >=1", that means that it must be at the first LEVEL of the trait or higher, or the first threshold number or higher? And for "Affects Drink 2", it means that it goes up by that much in the threshold number, correct?