Academic Guardian said:
Hey not all of them are like that
Yuuki is a straight up fighter! (and that would make them too similar to Spriggans)
Yuuki is going for obscene speed with her build.
And Spriggans are the illusionists, the shapechangers, and the vicious close-range fighters. They can get stuck in and stay there. Imps are more fragile; they need to boom-and-zoom. Imp shapeshifting is also explicitly tied to vampire legends (mist, bats, wolves, blood, that's it), whereas Spriggans have a much broader range.
Figure that the Imps, like the Puca, are relatively specialized in their combat role. If you wanted a more general-purpose fighter, you'd go with a Sylph, a Spriggan or especially a Salamander. Undine too, to some extent; they're still a bit fragile for the front lines, but can abuse healing magic to compensate.
Puca are pretty exclusively support types, unless you can get a group of them together who really know what they're doing. If that happens, they can do buff-related bullshit equivalent to a team full of Medics keeping everyone perpetually Ubercharged in TF2. Plus music, of course; Puca rap battles are more literal than the normal sort, and a hypothetical Puca frontliner is beating the shit out of people with a guitar (hell, there's probably one dude who picked 'Atomsk' as their handle and built their entire character around dual-wielding with a guitar in one hand and a bass in the other).
Cait Sith, played to their utmost racial affinities, are Pokemon trainers. Except they actually beat up the other trainers before stealing their money, instead of just beating up their Pokemon.
Endgame Leprechauns are Tony Stark.
Gnomes? Alchemy for fun and profit. Potions, poisons, potent potables. That's not their first line of defense, though; their first line of defense involves using Messrs. Hamilton, Jackson, Grant and Franklin to convince the opponent they'd rather do something else. Also, given that they're the dorfs of ALO, they probably had Drunken Fist as a Hidden Skill.