Rollo is Ragnar Lothbrok's brother, who is also a fierce warrior but is more impetuous and less thoughtful than Ragnar, who often overshadows him. Rollo has a wild, impulsive streak. Ragnar has promised Rollo that they will always be equals, but Ragnar's leadership inspires a devotion that threatens this, making Rollo's allegiance tenuous.Rollo needs some convincing that traveling to the west, as his brother wants, is worthwhile, but he is swayed when he sees the new navigational instruments Ragnar has obtained.Background: He is in love with his brother's wife, Lagertha, and makes his feelings known to her, but he is also able to make relationship decisions to advance his own position within the village.