Jatro is the Captain of the 5th (Battle) company Saurus Legion, and has been so for a very long time. His battle tactics tend to be focused around the concepts of Assault, Tactical and Devastator sections, as typified by the company he leads.
Jatro's long contact with the warp (due to the Fifth being posted up against Chaos half the time), his brain has been slightly fried. The psychic nodes in his brain have been crippled, and though this would prevent him ever manifesting abilities, it also grants him a small amount of protection against psychic powers.
In battle, he is accompanied by two veteran guards from the 5th itself. These guards carry bolt guns and power swords, and wear the Fifth Company honour guard colours.
Jatro fights using the Keirus Gauntlet, a special power glove with a pair of lightning claws mounted in the back, and a combi-weapon made from two bolters and a master-crafted plasma pistol.