This is the wiki entry for Kaiba: http://en.wikipedia.org/wiki/Kaiba

And this is Kaiba [titular character] himself:
http://i281.photobucket.com/albums/kk222/itsubun/snapshot20080512175826.jpg

Although, your question is complicated by fact that Kaiba been changing into different bodies during the past two episodes. That and he himself supposedly has no memories of his own, so his identity still remains a mystery to the viewer. Currently he is using the body of Chroniko, a girl whose memory has been removed because she sold her body off for teh moniez. Err… I think I’ll only confuse you more if I were to go on explaining, especially if you haven’t seen any of Kaiba yet. So I’d recommend getting your hands on the ureshii/f-b subs and watching it for yourself =]

@korosora: Good mention on the setting. Kaiba’s setting is literally out of this world and I think the dissociation is a technique used to distort the viewer’s perspective and equilibrium in order to make them more receptive to the heavy ideas and themes being conveyed.

@taka: I think the scene of Grandma’s death is very interesting in that it can fulfill both purposes as a metaphor of death and also as an actual rite of death that may be distinctive to Kaiba’s world. Such is the brilliance and multi-faceted narrative of Kaiba. *swoons*

@otou-san: LOL. Addressing you as such makes me feel like a scared little school girl about to be punished. Or maybe I have too much late night hentai in the bloodstream. Anyway, I think you bring up an interesting inconsistency in Kaiba. At the beginning of the show [and in the wiki summary of Kaiba], it is stated that the protagonist has no memories. And yet in ep 04, there are manifest flashbacks to the time that he spent with Neiro. What does this mean?! Perhaps Kaiba did not get his memories stolen, but they are simply repressed or locked away inside of him — as hinted by the cat-and-mouse scene with Vanilla inside of the vault-like manifestation of his mind. I guess we will have to wait and see. Oh, and I am all up for HxC analysis of Kaiba because I find them very enlightening for the most part. But I’m also very glad to see people [like yourself] acknowledging the “heart” of Kaiba as well. And I agree, the music and style are gorgeous.

As for this:

For Kaiba, someone without any memories of his own, it must be painful to see other people exploit each other’s and their own memories.

Possibly, but as he has no memories you have to wonder if he even has the internal gauge that measures what’s good or bad. Can he connect his situation enough with these people to empathize with them? I’ve often thought (and this is no new way of thinking) that memories are what define our sentience — even if a dog were capable of higher level thought, the lack of useful memory is a hinderance keeping things like morality from ever surfacing.

But that’s getting a bit away from the point. Some people are analyzing the crap out of Kaiba, which will happen with any sci-fi with a brain, but I’m with you — the strongest appeal is in the heart, not the head. And from the music to the style, it seems obvious to me that that is the intent of Kaiba, not just a side effect.

I believe Kaiba’s strong point is the setting: it’s creepily real and surreal at the same time.