always a good sign in a game when everyone has a different answer pretty much. Lol. aside from Xenon, Evan and Aran don't think anything else has been mentioned twice. (and aran and xenon were both mentioned in lists which had multiple chars to begin with)
Kanna... Because who doesn't love increasing spawn rates, mob density, and fast completing quests? Not to mention, major fan of RNG, and I love the random teleport, and how it's actually random and can be anywhere on the stage with traversable area. Makes getting around towns a lot easier when i'm on a far end and wanna get anywhere closer to anything.
(Also great for familiar collection [love collecting those], monster collection completion, you name it... Kanna's my #1... Sucks at combat mobility though, until 5th job advance)