• Open Tribe Nine on your device.
  
• Start the adventure and keep playing until you finish the tutorial (~20 minutes). [You only have to complete the tutorial once]
  
• Open your Mail and click on Claim All to get the free pull currency.
  
• Enter the Synchro summon menu and do two 10-pulls on the Featured Character banner.
  
• Your goal is at least one 3★ character. If you have the time, reroll until you have two 3★ characters.
  
• If the reroll is bricked, open the menu and click on Return to Title at the bottom.
  
• Click on the menu in the top left and then "Delete Player Data" and OK.
  
• Reenter the game and choose Skip when prompted to replay the intro.
  
• Repeat the process until you're satisfied with the reroll
  
• Finally, go to the menu and complete the Link Account process to save your progress.

There are plenty of websites giving their take on the game.

Don't treat this game as a gacha game. Treat this as a JRPG. Just play. Everything's farmable here without stamina.

Roll for your Waifus/Husbandos

i need miu and tsuruku in my life