- "He is an unkind and rough man, and he is easily angered."
- ―Derembus Sitnalta on Clenna.
He lated joined the Imperial Army, wanting to become a drill instructor. He never managed to get the coveted job, but he nevertheless learned much, specially theory. Although the Imperial propaganda never brainwashed him, he nevertheless despised the Rebel Alliance.
Suddenly too old for the Empire, he returned to Yalln, but soon he grew restless.
Trying to change his life, he joined the Galactic Outdoor Survival School as a means to "bark orders to impressionable recruits". He was instructed there by GOSS dean Barosa Warren, which increased Clenna's skill.
Due to his loyalty to Warren, and due to Warren being enemy of certain Rebel officers, the Rebel Alliance considered Clenna a threat. His former acquaintance Sitnalta, who was a Rebel soldier as of 2 ABY, wrote a report on Clenna explaining that age had taken its toll on Clenna, but he was still dangerous because of his resources at GOSS.