Heahmund is a complex character. He possesses a deep faith and love for Christianity, while at the same time a skilled warrior with a love for women and drink. As a man of the cloth Heahmund has received a classical education, and is quite intelligent. Heahmund has assisted King Æthelwulf and later Ivar with their battle plans, showing good strategic thinking. He is extremely ruthless towards pagans. He portrays himself as an absolute zealot with no middle ground.