Vesta/Abilities and Gear

Sorcery
He has indulged in sorcery, however, according to Kaijin, he is not too good at it. Vesta is an excellent researcher and developer, and has helped Tempest refine its potions production and take it to a large scale. He also helped construct the magic circles used to travel around Tempest from the Sealed Cave, to The Dungeon and the city proper. He has greatly contributed in realizing many of Rimuru's ideas, including but not limited to: the Control Room in the Dungeon, an instant camera, passenger airships, a train that runs on magical energy, gadgets, and tools of espionage for Souei and the rest of the Kurayami.

Diplomatic Skills
Vesta has spent his entire life developing his skills for when he would one day succeed his father as marquis. He knows how to play both a competent diplomat and politician, and has enough skill and knowledge to help Rimuru get a feel of the geo-political situation of the world.