Just let your imagination run wild, and then find logic and support to back that up. Abilities and character first, then build backstory around it.
I honestly don't know if there is a "way" to rp, but I just say to have fun. :)
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Thanks. Already on it. Got a layout that appeals to me nicely :p
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You can have your character come into play however you want, bridging to the point of insanity, by the way.