You can speak, read, and write Common and Primordial. Primordial is a guttural language, filled with harsh syllables and hard consonants.

You have advantage on saving throws against necrotic damage.

You have immunity against being charmed

1st-level necromancy

Casting Time:1 action

Range:Touch
Components:V, S
Duration:Instantaneous

You reach out and touch a creature, drawing upon the celestial and necrotic energies within you. Make a melee spell attack against the target. On a hit, the target takes 1d8 necrotic damage, and you regain hit points equal to half the damage dealt.

The spell's damage increases by 1d10 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).

You have vestigial celestial wings that grant you a flying speed of 30 feet. You cannot fly if you are wearing medium or heavy armor.

In addition you can cast Expedition retreat once per short rest 

Your Charisma score increases by 4, Constitution by 2 and strength by 3

The Celestial Exiles, having once dwelled in divine realms, experience a unique aging process. Physically, they mature at a rate similar to humans, reaching adulthood in their late teens. However, their aging process slows significantly once they enter adulthood, and they show little signs of physical decline until reaching the later centuries of their lives.

Fallen can not dye of old age so they can reach upwards of 1000 years

Due to the complex nature of their celestial past and exile, Fallen individuals often lean towards chaotic or neutral alignments, reflecting their struggle against preordained destinies.

Fallen are as varied as their mortal body generally built like humans, standing anywhere from 5 feet to over 6 feet tall. Your size is Medium.

Your base walking speed is 30 feet.