ROLE PLAYER Achievement in The Sims Medieval

The honorific titles are tied to your skills: Strength, Agility, Spirituality, and Charisma. You can see the level of your various skills in your journal: Open the journal by tapping on the book image in the lower right corner of the screen, and then choose the fifth icon.

You can level skills up by completing quests, or target individual skills as detailed below:
Strength: You can purchase an armory for your house (look under Workshop items) although it does take up a lot of the floor space and you will have a re-arrange existing furniture.
Agility: There is a dart game in the tavern. Playing this increases your agility. You can purchase one for your house (look under Workshop items).
Spirituality: There is a bookshelf in the back left corner of the church. Tap on that and you can read books which will increase your spirituality. Once you have completed any quests that raise your spirituality (or utilized the one in the church to the same effect), you can purchase a bookshelf for your house under Workshop Items.
Charisma: Once you have completed any quests that raise your charisma, you can purchase a mirror for your house under Workshop Items. Tap on it and you will preen in front of the mirror for a bit, increasing your charisma.

You will need all skills at level 10 to unlock this achievement.