Traits represent a character's personality, abilities and physical characteristics. They affect a variety of areas, everything from attributes to relations. Because of the many bonuses traits provide (or maluses they may inflict), paying attention to obtaining the right traits is essential for a good ruler.
Many traits are opposites or different levels of the same characteristic, and hence can not both be held at once: a character who is Slow can obviously not be a Genius, but they can not be Quick either, for Genius is an improved version of Quick.
 Education traits
Each character gets a single education trait upon becoming an adult and dependent on the child's education. They are generally based on the education of their guardian, though there is some random variation. The higher-level military educations also grant leadership traits. Military educations can improve to the next level by a random battlefield event, but the others are fixed.
Health-related traits are usually obtained through events or epidemics. Characters at court in a province being ravaged by an epidemic disease may randomly be stricken by it. The "Scarred" trait is obtained when Wounded character heals successfully. Great Pox, i.e. syphilis, can be transferred through sexual contact. The "Infirm" trait can only be obtained by event if the character in question is 50 or older.
|ID||Diplomacy||Martial||Stewardship||Intrigue||Learning||Health||Fertility||Sex opinion||Vassal opinion||Other|
|Depressed||22||-1||-1||-1||-1||-1||-1||-5%||Lets you commit suicide through the decision panel|
|Lunatic||23||-25||-25|| +10 Opinion with other Lunatics|
AI Rationality -50
|Possessed||24||-25|| +10 Opinion with other Possessed characters|
AI Rationality -40
|Syphilitic||27||-1||-1||-1||-1||-1||-2||-20%||-30||Inherit Chance 10%|
|Maimed||30||-2||-2||-15||+10 Opinion with other Maimed characters|
|Infirm||31||-3||-3||-3||-3||-3||-1||-30%||AI Rationality -10|
|Incapable||32||-6||-6||-6||-6||-6||-3||-30%||Character will need a regent|
|Drunkard||33||-2||-5||AI Rationality -5|
|Aztec Disease||132||-1||-1||-1||-1||-1||-3||-20%||-30||Sunset Invasion DLC|
Congenital traits are randomly assigned at birth (although a few, like Stutter, may also be granted by childhood events). Parents have a (small) chance of passing these traits onto their children.
Lifestyle traits are given at the end of certain long event chains. Ordinarily, a character may only have one. Note that the Muslim-only trait Faqih also counts as a lifestyle.
Personality traits appear during childhood, but may also be gained or lost by events later in life. All personality traits with even ID numbers are opposites of the trait with the preceding odd-numbered ID. Christians with at least 8 Martial and 25 Piety who are Humble, Diligent, and Brave but do not have any of the Seven Deadly Sins are considered true knights of Christendom.
 The seven heavenly virtues
 The seven deadly sins
|ID||Diplomacy||Martial||Stewardship||Intrigue||Learning||Sex opinion||Vassal opinion||Church opinion||AI Effects||Other|
|Deceitful||87||-2||+3||Honor -25||-10 Opinion towards Honest characters|
|Honest||88||+3||-2||Honor +25|| +10 Opinion with other Honest characters|
-10 Opinion towards Deceitful characters
|Craven||89||-2||-5||Morale Defense -20%|
|Brave||90||+2||+10|| +10 Opinion with other Brave characters|
-10 Opinion towards Craven characters
|Gregarious||92||+2||+5||+5 Opinion with other Gregarious characters|
|Ambitious||93||+2||+2||+2||+2||+2|| Ambition +40
|-50 Opinion towards characters they want something from|
|Content||94||-1|| Ambition -40
| +0.5 Piety/month|
+50 Opinion towards Liege
|Arbitrary||95||-2||-1||-10|| Rationality -20
|Just||96||+2||+1||+10|| Rationality +20
| +10 Opinion with other Just characters|
-10 Opinion towards Arbitrary characters
|Cynical||97||+2||-5|| Rationality +10
| -0.2 Piety/month|
+10 Opinion with other Cynical characters
|Zealous||98||+2||+10|| Rationality -10
| +1 Piety/month|
+30 Opinion with other Zealous characters of same religion
|Cruel||101||-1||+1||-10|| Honor -10
|Morale Offense +10%|
Leadership traits are gained by characters with Martial education, or through events triggered after a battle in which the character was a leader. "Veteran soldier" grants one trait, while "Brilliant Strategist" grants two. A high martial skill enhances a character's bonuses and mitigates the penalties of leadership traits.
These traits are exclusive to Muslims, except for Sayyid and Mirza, which are "genetic". Sayyids are the children of Sayyid fathers, while Mirzas are the children of Sayyid mothers. "On Hajj" is granted during a Hajj, and replaced by "Hajjaj" afterwards. Mujahid is the Muslim equivalent of Crusader.
These traits are gained through special actions or circumstances.
|ID||Diplomacy||Martial||Fertility||Sex opinion||Vassal opinion||Church opinion||Notes|
|Crusader||40||+2||+25|| +30 Opinion with other crusaders.|
AI Zeal +10
Gained by reaching the crusade target kingdom.
|Bastard||41||-1||Automatically gained at birth by illegitimate children. Prevents being a normal heir.|
|Twin||42||+30 Opinion with fellow twin.|
|Legitimized Bastard||43||-1||Gained through sire's event choice. Allows for normal inheritance.|
|Pregnant||44||+25 Opinion from spouse|
|Excommunicated||45||-5||-30|| -30 Opinion from characters of the same religion|
|Kinslayer||46||-3|| -25 Opinion from dynasty members|
Gained when executing family members or when discovered assassinating them. Muslims get no penalty for killing siblings or cousins. If in good relation with the pope a special event can remove the Kinslayers trait if you pay him a certain amount of gold.
|Homosexual||47||-15%||+30 (other homosexuals of same gender)||-10||
Sex effects are "flipped" - that is, if character A is attractive and male, and character B is homosexual and male, opinion bonus will be applied. If character A is instead female, the bonus will not be applied.
|Pilgrim||119|| +0.10 Piety/Month
Gained by completing the Pilgrimage chain of events.
|Blinded||123||-6||-10|| -2 Stewardship|
|Born in the Purple||124||+10|| +0.5 monthly prestige|
Given to children born to a Byzantine Emperor during their reign.
|Augustus||125||+15|| +0.5 monthly prestige |
Automatic trait for the emperor of the restored Roman Empire
|Child of concubine||133||-1||For characters born to a Pagan or Zoroastrian ruler's consort. Can inherit.|
|Peasant Leader||134||-5||-20|| For randomly-generated leaders of peasant revolts. |
+50 with other peasant leaders
For randomly-generated leaders of heretic revolts.
Norse pagans may acquire trait through battle event
North Germanic characters get trait through event chain
+20 Zoroastrian opinion
+10 Zoroastrian opinion
Norse pagans gain through event while raiding