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Roleplaying a Padjal, an Elemental or a chosen one of the Elementals is just making your character a Mary Sue. Padjal are part of Gridania's ruling body, so it is a major "Mary Sueism", even if you imply he's wandering around and not delving in politics. Still, they are directly influenced by the Elementals, so besides being a leader of Gridania (and nobody could refute you because that's what Padjal are meant to do) you are also a Chosen One. Being deemed pure by the Elementals is akin to being a Chosen One of any other god-like entity. Being one of the Elementals taking physical form is no different that implying your character is Nophica made manifest, or that you are a piece of Bahamut soul. It's just asking for incredible trouble.
Of course, if you don't care about the implications your character has on other roleplayers (maybe because you are part of a close group who is okay with those type of characters), then be my guest.
All the other suggestions are intereting and plausible enough, though, specially the Wildlings one, though you have to remember Wildlings are 'cursed' to roam the Shroud forever, so it might be hard to justify going anywhere else ICly. Not impossible, but pretty hard to do unless you handwave it with "the Elementals work in mysterious ways".
Of course, if you don't care about the implications your character has on other roleplayers (maybe because you are part of a close group who is okay with those type of characters), then be my guest.
All the other suggestions are intereting and plausible enough, though, specially the Wildlings one, though you have to remember Wildlings are 'cursed' to roam the Shroud forever, so it might be hard to justify going anywhere else ICly. Not impossible, but pretty hard to do unless you handwave it with "the Elementals work in mysterious ways".