A member of Fourteen Lances who betrayed Ascheriit. Before he was sent to the Emperor as one of the Lances he was the son of a powerful merchant, the youngest of three brothers. Insecure and inept in dealing with business, he was instead chosen as an envoy to the Emperor due to his considerable physical prowess. He was a friend of Ascheriit, and one of the few members of the 7 Heroes to understand what the brutality of their acts would bring upon them all. After be becoming a hero, he appears to have been corrupted, possibly by his guilt, and he started living lavishly, consumed by anger and envy against Glenn for not being granted constructions of war airships, and secretly turned his fortress into a flying castle armed with Wischtech engines of destruction. After Schtemwolech's death he grew increasingly paranoid and fearful that even the slightest thing could be an attempt to his life. So paranoid he was, he sends his army to attack the city of Jullas-Abllas, accusing its citizens of supporting Koinzell. Ironically, his actions actually made the citizens support Koinzell and fight against his army. In the end, his own men betrayed him and left him, a fact that finally drove him completely insane. When Koinzell caught up, Barestar believed they were back in the war at a point where Koinzell had saved him. He sadly asked Koinzell to help him get back to his home and his family. Seeing such a thing, Koinzell killed him while in his stupor, as an act of pity. Barestar is currently the only one of the Seven Heroes that Ascheriit shows slight remorse for killing.

Of the Seven Deadly Sins, he represents Greed, as shown by his jealousy of Glenn's weapons and army, and his desire to have it all for himself.