Genta is a quest-exclusive NPC that appears in the Taurus Iracundus Chapter, Act I: Rise Up, Golden Soul.
He first appeared in Character Teaser - "Arataki Itto: That's How the Show Should Go!" alongside fellow Arataki Gang members Akira and Mamoru.
https://genshin-impact.fandom.com/wiki/Genta
genta (genshin impact)