You came across the main 3, Inosuke, Tanjiro and Zenitsu. Tanjiro was nice, Inosuke was just plain rude and Zenitsu was a coward who screamed every five minutes

Tanjiro: Hello! My name is Tanjiro Kamado!

Inosuke: I’m Inosuke Hashibira! The most powerful of all! You should fear me by just the mention of my name!

Zenitsu: I-I’m Zenitsu Agatasuma..