@Atroticus Apparently the English Translation team for the Anime (and Games on the SNES and whatnot) fucked up and read her name as "Trista" (or Tristan, something similar) and the error was never fixed and it stuck...so she now has two "correct" names...her "original" name, Setsuna, and her "English" name, Trista. Kinda dumb, I know, but it went unchecked for so long that it's pretty much considered an "official" other name for her.