Unusual for a dwarf, Vesta is of a slender build, and rather tall, but around the height of a normal human.
After joining Tempest he has become more reliable. He got rid of that sharp personality and mellowed out.
Vesta is an unexpectedly useful dwarf. Rather than politics, he is made for science. He was very boring when he was obsessed with political power.
Vesta was the son of a marquis and second-in-command of Dwargon's engineering corps. He often argued with Kaijin, head of the engineering corps. At some point, the corps launched a magic-armor soldier project. Kaijin warned Vester that he was proceeding too quickly with the project, but his advice was ignored. A failed experiment grounded the project to a halt, and Vester put the blame on Kaijin. Kaijin took full responsibility and resigned from the corps.
He requested Kaijin and co. to create 200 steel spears and 20 magisteel swords, fully aware that Kaijin will struggle with the order.
He later discovers the group at a nightclub and mocks Rimuru. This caused Kaijin to punch him, leading to the group's arrest. He bribed their lawyer to frame them, but Gazel Dwargo knew the truth and exiled them instead. After Rimuru and Kaijin's group left, Gazel expressed his disappointment at Vesta’s actions and stripped his title of minister.
He was brought to Tempest by Gazel to work under Rimuru. After apologizing profusely for his past actions, he was tasked with creating healing potions.
He and Gabiru are rather compatible. Because of that, he was allowed to reside in the Sealed Cave. The cave happened to be the perfect atmosphere for science experiments. Gabiru assigned two of his subordinates to guard Vesta. Later, he joined with Ramiris in her labyrinth to conduct research.
He has indulged in sorcery. However, according to Kaijin, he is not too good at it. Vesta is an excellent researcher and helps Tempest refine its process to produce its health potions on a large scale. He also helped to construct the magic circles used to travel around Tempest from the Sealed Cave (where Rimuru and Veldora met), to the Labyrinth and to the city proper. He is also an excellent conceptualized inventor as he assisted with many of the marvels of Tempest including but not limited to the Observation Room in the Labyrinth and its monitoring magic, an instant camera, passenger airships, a train that run on magic energy, gadgets, and tools of espionage for Souei and the rest of the Shadow Squad.
- Kaijin: For Vesta who was noble, it was humiliating for him to be forced to take orders from a commoner. But he apologized to Rimuru and Kaijin.
- Gabiru The two become fast friends and are often seen together.