ability score increase:
+4 to Charisma, +2 to strength if over 500 years
age:
Succubuses/Incubuses can live up to 1,000 years and once they've passed 500, they gain a +2 to strength
alignment:
usually chaotic Neutral
Size:
Medium
speed:
60 ft in air, 30 ft on ground
Languages:
Abyssal, Common, Infernal, and Telepathy