If you were in the Yu-Gi-Oh! World....

[Yami Haga-Ryuzaki]

Okay, heres what you do, I'm going to write down some names and you say how you'd treat them, or what you'd do to them.
Here they are:-

YUGI
YAMI
JOEY
TRISTAN
DUKE
SERENITY
TEA
MAI
SETO
MOKUBA
MARIK
BAKURA
RYOU
REX
WEEVIL

Okay?Now heres what I'd do, I'm pretty slack to most of the characters though-

Yugi-I'd probably act nice and all that at first, then I'd slowly grow more and more cold towards him
Yami-I'd avoid him, as he's an ancient spirit I'd constantly say he should be dead
Joey-Not talk to him, blame him for Rex's problems
Tristan-I'd ignore him, call him a loser maybe
Duke-Respect him more than the others in the gang, but still secretly hate him
Serenity-Act as though shes a little girl who can only cry
Tea-Try and show her up at school and dancing
Mai-I'd try and get on her good side, constantly tell her she's cool
Seto-Be respectfull, don't want to get on his bad side
Mokuba-Be polite to him, but occasionally swear by accident
Marik-I'd be too scared to go near him
Bakura-RUN!!!EEEKK!
Ryou-Smile politely, then walk away muttering dweeb
Rex-I'd be as friendly as possible, and maybe give him a few cards to gain his trust.Maybe promise to help him crush Wheeler
Weevil-Constantly flirt with him, and maybe steal his glasses

Thats my list, I know. I'm a [censored] to most of the characters but I don't care.
I'm evil in the Yu-Gi-Oh! World

[Symos]

YUGI: Probably exchange strategies and tips. Maybe work some trade.

YAMI: I wouldn't mind testing my skills against this guy.

JOEY: Probably exchange tips and strategies.

TRISTAN: I'd probably teach this guy to duel properly.

DUKE: I'd like to ask about DDM and see if there are any difference to Mattel's version.

SERENITY: Agian I would teach to duel properly. Just incase her life depends on it again.

TEA: If I hear one speech on friendship I'm making it look like suicide.

MAI: Another one I want to test my skills against.

SETO: I would endevour to earn this guy's respect.

MOKUBA: I'd ask this guy how to earn his brother's respect.

MARIK: If I bought this guy a Harley would he stop being evil?

BAKURA: Is this the evil Bakura? If so I'd avoid this guy until I had a Seal. But before I finish the job, I'd ask why he chose a goody goody as a host.

RYOU: Ask him why he puts up with the evil dude.

REX: Try to trade off my 3 Urabys.

WEEVIL: I'd duel this guy, but if he tries any funny stuff...

[Yami Haga-Ryuzaki]

lol, whats a Harley?

[Symos]

Harley Davidson. A make of motorcycle.

[Yami Haga-Ryuzaki]

I thought he had one
Cause in Battle City he was riding it

[Symos]

Harleys are supposed to be good bikes.

[Shaun]

YUGI: Talk to him
YAMI: Ask to become friends and ask for a duel
JOEY: Ask for a duel
TRISTAN: Incourage him to ask Serenity out
DUKE: Incourage him to ask Cystal out
SERENITY: Tell her a cute she looks
TEA: Flirt with her
MAI:
SETO: Ask for autograph and a duel
MOKUBA:
MARIK:
BAKURA:
RYOU:
REX:
WEEVIL:

[Yami Haga-Ryuzaki]

Jeez, you don't socialise a lot

[Shaun]

Yeah.

[Yami Haga-Ryuzaki]

S'ok, I guess I can't talk either
I'm being mean to all the characters

[Shaun]

Cool.

[Yami Haga-Ryuzaki]

That had to be sarcastic!

[Shaun]

No, it's quite funny.

[Tea Gardener]

What do you mean Quaker, "I'll make it look like Suicide?"
That isn't very nice

[Shaun]

Tea!

[Tea Gardener]

Yes? Who might you be?