You could always play the genius card. I mean, don't go over-board with it, but considering miqo'te aren't really fans of the cold (and probably are repelled by the Ishgardians view of the world) you could ask yourself this. Why would the Ishgardians let your character join? What about your character would be unique enough to where the could not turn your character away?
I mean, judging from the MSQ, the Astrologians are not a club where you can just show up and get in. Ishgard hates outsiders too. However, something about your character, a possible discovery everyone over-looked or just a high level of skill, would probably make the astroslogians of Ishgard think, "Woah... we could improve if we added this person to our team!"
I mean, judging from the MSQ, the Astrologians are not a club where you can just show up and get in. Ishgard hates outsiders too. However, something about your character, a possible discovery everyone over-looked or just a high level of skill, would probably make the astroslogians of Ishgard think, "Woah... we could improve if we added this person to our team!"