Hit Die: d8.
The aristocrat’s class skills (and the key ability for each skill) are Appraise (Int), Bluff (Cha), Craft (Int), Diplomacy (Cha), Disguise (Cha), Handle Animal (Cha), Intimidate (Cha), Knowledge (all skills taken individually) (Int), Linguistics (Int), Perception (Wis), Perform (Cha), Profession (Wis), Ride (Dex), Sense Motive (Wis), Swim (Str), and Survival (Wis).
Skill Ranks per Level: 4 + Int modifier.
To add some flavor to your aristocrat, look at Aristocrat Boons.
The following are the class features of the aristocrat NPC class.
Weapon and Armor Proficiency: The aristocrat is proficient in the use of all simple and martial weapons and with all types of armor and shields.
Pathfinder RPG Core Rulebook. Copyright 2009, Paizo Publishing, LLC; Author: Jason Bulmahn, based on material by Jonathan Tweet, Monte Cook, and Skip Williams.