Yumi is a no-brainer. Japan, obviously.
I'm going to assume that Jeremie is French, considering his last name. He and Aelita are probably the only main characters that don't have a lot of family backstory to work with.
Odd is a tough one. His first name is Norwegian, but his last name is Italian. I can't say that he's not either one of them, although I'm seriously doubting that he or his parents are of direct Italian descent, merely from Odd's hair and skin color. He has light hair and is fairly pale, which is deffinately not of Italian characteristics. I can't make any assumptions, although in a fanfiction I'm writing where there is a short flashback, Odd speaks Norwegian as a first language.
ThePepsiPiper wrote:Your De-Virtualization wrote:I'm tellin' ya, his dad's gotta be in the military! That's why he has no nationality, practically.
Uhh...
Anias Fiquet is probably French. xD;;
I can't see Odd being the son of a military man O.o I mean... If Odd turns sidewise you can't even see him! lol
It's actually fairly likely that either his father, brother, grandfather or some other relative is in the military. Taken directly from his Wikipedia file:
Several small clues in the series reveal that Odd may have had a relative who was in the military. For example, in "Just in Time", he tells Milly and Tamiya "About face," which is a term used in the military for a 180° turn to the right from the position of attention. He says this in many other episodes, like "Attack of the Zombies", usually to prepare his friends for battle. He also commands XANA's monsters like an army in "Marabounta", and was complimented by Yumi for being a good combat general. Since his parents are artists, it would likely be his grandfather, or perhaps his father.