race features:
Hot Bloodied: You have Resistance to fire damage and as an action you can emit heat from your body, up to enough heat to cause creatures to sweat. At full burn, this makes grapple checks made without tools against you have Disadvantage.
Reach to the Blaze: You know the Produce Flame cantrip. Once you reach 3rd level, you can cast the Burning Hands spell once a day at 1st level. Once you reach 6th level, you can cast the Fireball spell once a day at 3rd level. Once you reach 10th level, you can cast the Flame Strike spell once a day at 5th level. Once you reach 14th level, you can cast the Investiture of Fire spell once a day at 6th level. You regain the use of the spells after a Long Rest. Constitution is your spellcasting ability for these spells.
Common features of Fire Spiri are, strands of fire for hair, pupils that look like points of fire, veins that glow red, ashy skin tone, noticeably projecting a warm heat.