Your Charisma score increases by 2 and your Intelligence score increases by 1.

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

Devil blood runs strong in them usually they are selfish and greedy, often ending up Evil 

Fox Devils are around the same size as humans but often a bit shorter and leaner 

your infernal blood helps you use the darkness as a tool, 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.

Deceit runs in your blood, you know how to lie and how to catch one, you have proficiency in Deception and Insight 

Lying is what you're best at, but its a problem when others know what your race is like, if you lie to someone and they know what Fox Devils are or they know something you did that made you untrustworthy, they make a Charisma save (DC equal to 8 + your proficiency bonus + your Charisma modifier), if failed they ignore the fact that you're a devil and seemingly "forget" any wrong you have done to them, if they succeed they see you as normal. if someone that person knows tries to remind one that is under the effect, they get to roll again with advantage and "remember" if they succeed 

Your alignment cannot be detected by any magical or non-magical means, you can also choose to have it appear as LG