Saikyou no Shien-shoku "Wajutsushi" Dearu ore wa Sekai Saikyou Kuran o Shitagaeru (Novel)

From Seven Seas: Noel longs to be a Seeker like his heroic grandfather, slaying the beasts that emerge from Abysses and exploring far-off lands. Unfortunately, it turns out he’s nothing but a measly Talker–a job with no combat skills whatsoever. Undaunted, Noel sets out to establish the strongest clan in all the land, using his silver-tongued Talker skills to unite assassins and heroes under his leadership.