The Executioner is a village character in The Sims Medieval. The executioner lives in a small hut next to the pit of judgement where Sims get punished by death. The Executioner is almost always outside their hut and occasionally feeds the beast. The Executioner does not arrest people and does not put them in the stocks, The Constable handles the arrest of sims.
This Sim can be romantically involved with hero Sims, but can't leave their post to visit a hero's home and WooHoo. As well, hero Sims can't propose marriage to the executioner. The game says that they are not interested in a long-term comittment.