When first appearing, Buck Oliver was a deceptive yet highly intelligent fourteen year old. He usually seems to be chewing on a toothpick, but is always told to get rid of it. He had a decent personality and was said to be "handsome", but that is just the outward appearance. As time progresses (in The Green Ring Conspiracy), Buck's shrewd nature begins to show making several Odyssians feel betrayed, yet others (like Katrina Meltsner) believed he had a "good heart" and could change if given the chance. Mr. Skint abandoned him because of this. After his time in JD, he seems eager to prove that he has changed for the better.
Nothing is known about his history, except that he moved around a lot with Mr. Skint. It is possible that they went around doing odd jobs for criminals here and there, or they could have worked with the Green Ring the whole time, and went wherever the Carnival and counterfeit money went.
Buck's mother left after his father died, when he was young. It is known that his father did not die in war, although it is not known how he died. His so-called guardian was Jebidiah Skint. It has been revealed that he went to Juvenile Detention after the Green Ring series; Connie thinks that Eugene and Katrina should adopt him (The Ties That Bind, Part 1) and Eugene and Katrina bring him into their home on The Ties That Bind, Part 4.
|“|| Jay Smouse: I bet you already blabbed about the AppleBerry phone he's been working on.
Emily Jones: What AppleBerry phone?
Buck Oliver: He found the phone?
Jay Smouse: Yeah. And he's gonna be really ticked when he finds out you told. You're a regular Judas Benedict Arnold!
Emily Jones: Jay! You just told us. We didn't know!
Jay Smouse: I—I di—oh...um...well, gotta go!
|“|| Jay Smouse: Hey, where you going?
Buck Oliver: I have an errand to run.
Jay Smouse: Oh no you don't! Stay right where you are or I'll fire!!
Buck Oliver: That's an ice cream scoop.
Jay Smouse: Yeah, it is. And I know how to use it!
John Whittaker: Oh, hello Buck.
Eugene Meltsner: Someone apprehend that youth!
Buck Oliver: Sorry Mr. Whittaker, things are a little crazy around here. Now I really need to go.
John Whittaker: I don't think so.
|“|| Katrina Shanks-Meltsner: Did Mr. Skint visit you?
Buck Oliver: I'd rather not talk about him...if you don't mind.
|“|| Emily Jones: I’m on a case!
Jay Smouse: Yeah? Well, so am I. And I bet my case is bigger than your case.
Emily Jones: Oh, really?
Jay Smouse: Yeah, like yours is probably just a little case with clip lock combination thingies, where my case is like a big trunk with lots of compartments and huge steel padlocks that are STRONG...
Buck Oliver: Weren’t you goin’ to your uncle’s?
Jay Smouse: Oh, yeah, yeah…got lost in the metaphor for a second.
|“|| Jay Smouse: Go ahead and deny it!!
Buck Oliver: All right. I deny it.
Jay Smouse: Oh.
|“|| Buck Oliver: Nice...backpack.
Don Polehaus: Yeah, it is. I bought it because it matches the coffee stains on my shirt.
|“|| Buck Oliver: What are you doing?
Jay Smouse: Ahh! Me? I was just admiring your truck.
Buck Oliver: This truck?
Jay Smouse: Yeah, it's ...um... big!
Buck Oliver: You have a thing about big trucks?
Jay Smouse: Oh yeah. Ever since I was a kid, you know, rrrr,honk honk,rrchrrr,back it up, parallel park... with a truck.
Buck Oliver: If you want to make friends, don't ever do noises like that again, OK?
Jay Smouse: Yeah.
|“|| Buck Oliver: What was going on?
Jay Smouse: A friend of my uncle's got sick.
Buck Oliver: Is that why the cops were around?
Jay Smouse: Yeah. You know, they take sickness seriously around here, so...
Buck Oliver: It's a crime to get sick in this town?