Finally got my Takumi!! How can one check the +/- stats?
No, I pulled only greys to get Takumi and even if you exit the probability goes up after 5 different pulls. Did 12 pulls total to get him and my probability had gone up .50% (.25% after 5 pulls)
Take a screenshot of him at level 1 stats.
Put it in a calculator.
https://fireemblem.gamepress.gg/fire-emblem-heroes-iv-calculator