The re-roll guide is from reddit:
https://www.reddit.com/r/DissidiaFFOO/comments/7tvmge/gl_reroll_megathread/
Android device or BlueStacks:
Go to your device settings then select Applications or Application Manager
Locate the OperaOmnia application, select it, then press clear data
You can now start a new account after the initial download.
https://www.reddit.com/r/DissidiaFFOO/comments/7rh9t6/global_upcoming_release_megathread_faq/
For the reroll, you might want to see who you like the most. But I'm going for Cloud since he's a safe bet (still useful in JP ver).
(For 1 draw only)
Re-rolling starts after you defeat the first boss (iron giant),
Clear the equipment quest to collect the 5k event gem from the mailbox. Do the weekly summon and see what you get from there. If lucky, can get many 5* equips with 1 draw.
(For 3 draws)
Continue clearing the battles until you complete the whole of chapter 1, where you will be granted another 10k gems.
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You can skip the long intro after it has downloaded the 7xx files by restarting the apps, and there will be a skip button.
I dont have much patience for it, so I settled with 1 draw and cloud weapon. Keep the rest of the free gems. :b9: