Senu was a masked, leather-armoured Seguleh warrior. Like his people, he chose not to speak, instead using body language to communicate with those around him. He was described as a short, lithe man with dark eyes.
His ornate, enamelled mask was crowded with dark-stained patterns made of a mixture of charcoal, saliva, and human blood. This, and his willingness to communicate nonverbally with non-Seguleh, indicated his low rank among his people. By his own admission, he was fourteen years old and an Eleventh Level Initiate.
Senu carried twin broadswords.
Senu and two other fellow Seguleh, Thurule and Mok, were either enchanted or coerced into the service of Lady Envy before they were introduced to Toc the Younger and Tool at Morn. Since he and his brothers were the Seguleh "Punitive army" aiming to directly challenge the Pannion Seer, he travelled with them in order to fight the Pannion Domin.