@Sionnie If you go through the entire character creation process in the app, there are sections where you can put down everything you want for your character. Alternatively, you can take those sections and write it down proper in here so that I can incorporate it into the proper Character Sheet for DnD.
@Sionnie Please roll 4 times using 4d6 and give me the best stat result. You can move the Strength, Charisma, Dexterity up and down to suit your character.
@Sionnie Did you use 3d6 or 4d6? 3d6 results in a max stat of 16. 4d6 results in a max stat of 18.
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The primary stats of a rogue are DEX and CHA. Although I'd say never neglect CON as that determines how much HP you have. Status effects like you mentioned are all dependent on what abilities you have at your disposal (in otherwords, you may not be able to do it in combat).
@Sionnie All of the said features of a Tiefling is inherited as part of their race. Being a rogue means you still get all of those benefits.
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Tieflings in the Fifth Edition are fire resistant. They take half damage from Fire-based attacks.