Aasimar mature at the same rate as humans, but they can live up to 160 years.

Fallen Aasimar are most commonly Neutral, living their lives freely as any person would. On occasion their spite for the Celestials can warp their personalities and cause their alignment to lean more towards Evil.

Fallen Aasimar have the same range of height and weight as humans. Your size is Medium.

Your base walking speed is 30 feet.

Your soul still clings to the remnants of your once radiant soul. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray.

 You can speak, read, and write Common and Celestial.

You have resistance to Radiant damage.

You know the Light cantrip, charisma is your spellcasting modifier for it.

Every fallen Aasimar is cast out for a reason, your choice here is your reason and the severity is up to your choosing. Exhibiting one of these sins is shamed among other Aasimar and depending on what caused you to fall you have gained certain talents relating to the sin. You may choose one of the following options and gain the associated benefits and drawbacks. This decision cannot be changed.

• Wraith- Your anger has driven you for much of your life, you are hotheaded and even the smallest of insults can spark conflict with you. You gain a +1 to Strength and proficiency in the Intimidation skill. Conversely your anger and spitefulness gives an abrasive air to your personality, you gain disadvantage on Persuasion skill checks.
• Lust- Your are a servant to your own desires, sometimes to a dangerous extent. You gain a +1 to Charisma and proficiency in the Persuasion skill. Your need for certain things can cause you to become overbearing occasionally granting you tunnel vision as you seek out what you desire, you have disadvantage on Perception and investigation skill checks while in cities or towns.
• Gluttony- You simply cant contain yourself sometimes as your stomach can occasionally guide your actions. You gain a +1 to Constitution but you require twice as much food to remain nourished. 
• Sloth- Your distain for work as granted you an uncanny ability to avoid it all costs. You gain +1 to Dexterity and proficiency in the Stealth skill. Your lazy nature and constant resting means that you are easily convinced to do things that will result in resting sooner rather than later, you have disadvantage on saving throws against being charmed or being put to sleep. 
• Greed- You can never have enough, your desire for material wealth is matched only by the most Ancient of dragons. You gain a +1 to Wisdom and proficiency in Investigation. Your greed is often your downfall as you can become blind to that which is around when the promise of treasure is around, You have disadvantage on Perception checks when in caves, dungeons, or places in which you are seeking material worth. 
• Pride- You feel that even the mountains are below you, your confidence is boosted by any and all compliments, genuine or otherwise. You gain proficiency in the Deception and Intimidations skills. Your ego can sometimes get in the way and seeing the bigger picture is sometimes hard for you, you have disadvantage on Persuasion skill checks.
• Envy- You've always crave that which you do not have and have always strived to find away to get it, your astute mind allows you to see the finer details of other people. You gain a +1 to intelligence and proficiency in the Insight skill. You often are lost in your own thoughts of wishing for more and fail to hide some of your personal opinions of others, you have disadvantage on Intimidation skill checks.

After being cast down from the divine realm your once full, white feathered wings slowly wilted and darkened in an agonizing process as much of the divine energy that filled your system was torn away. You were left with non functional wings of a dark color,  the exact details are up to your decision but some examples are:

• Pitch black fully feathered wings not unlike a raven
• The skeletal bone structure of what once was wings but now seems to be skeleton like claws

Another side effect of this transition was the ability to hide your wings, one final gift of pity from those who cast you aside. As a bonus action you may cause your wings to appear, sprouting from roughly your shoulder blades. While hidden away your wings leave some sort of a distinguishing mark on your back that is reminiscent of celestial text or just imagery of wings in general. These marks can take any form you wish and can range from anything to a tattoo to physical scarring.

Every day at dawn you may attempt to pull upon your residual ties to Mount Celestia and ask for a temporary favor. The Celestials in response may decide to grant you a boon on this day out of the acknowledgement that you are still of Celestial blood. When you call for aid, roll 1d20. Should you roll below your level your call shall be answered with a favor that grants the following effects:

• Your Once flightless wings will now become fuller and fully working,  you gain a flying speed that is equal to your movement speed.
• You have disadvantage on all stealth checks
• You no longer can hide your wings and they are clearly visible at all times regardless of any form of illusion or transmutation magic you use in an attempt to hide them
• The feathers of your wings are sprinkled with patches of white feathers

The next time you take a long rest you lose your temporary boon and all the effects listed above are lost. This boon is an act of kindness on behalf of the celestials and done out of a slight feeling of pity for you, given this fact upon being granted a boon you may not call upon it again for another 1d4 days.