Backstory:

He is the sheriff of Wild Wild Town, he has a rivalry with Pablo and is friends with Lolina, he uses a revolver that shoots marbles, but he has a twelve that he uses in last cases, he is very good with new people in his city, he hates criminals.

During the genocide battle he uses his shotgun.

Pre Battle Text:

[Neutral/pacifist]

J-o: So, I was walking around and found a poster.
J-o: In it there were your faces.
J-o: I know it was made by the emperor.
J-o: He has a bad reputation when come to those wanted.
J-o: But I need to be sure.
J-o: Let's duel.

[Genocide]

[After Lolina is shot]

J-o: What the-
J-o: What was that for?!
J-o: She didn't do anything!
J-o: You know what?
J-o: Screw this.
J-o: This is no longer about arresting you.
J-o: It is about killing you.

Check Text:

[Neutral/pacifist]

*Jack-o the Sheriff.
*Thinks we are criminals, we can prove him wrong.

[Genocide]

*Jack-o the Sheriff.
*Let's show him what crimes we committed.