Yugi
Elayne's closest friend would be him. She admires his strenght and loves to hang out with him. She is the only one who knows his feelings about Anzu
Pharaoh/Yami
Just like Yugi they're quite close, not only because they have a past
Joey
Joey and Elayne can get quite good along with eachother, she respects him as a duelist and he makes her laugh a lot.
They have a lot of fun together.
Anzu There's no bad blood between them, at first Anzu thought Elayne would try to take Yami away from her. But when she sees her acting when Ryou is around, she changes from opinion.
Tristan Not a real bond between those two
Ryou Elayne is completly in love with Ryou and luckily he likes her too. They live together, but go to different schools. He was the one who promised her to get her out of the cave and took care of her later.
When he got send to the Shadow Realm by Yami Marik, Elayne was inconsolable.
Yami Bakura After Pegasus and YamiMarik, she hates him the most. When he takes control of Ryou and such..
Mokuba She finds him a cute little boy, but Mokuba shares another feeling. He was secretly in love with her, later he just want to be friends though.
Kaiba "He's charming on his own way" that's what she said once about him. She has respect for him, but is not afraid to tell him how jerkisch he can be
Miho They probably won't become good friends since Miho also was in love with Ryou and never could get him. She accepts Elayne as his girlfriend, but will never like her
Marik At first the is the biggest jerk of the whole world, after he became good again, he and Ryou turned out to be friends. Also somewhat with Elayne
Yami Marik If she could wish someone to hell with only looking at 'im, he would be send more then a thousand times
Ishizu They can get quite along, when she hasn't got her Millenium Necklace anymore, Elayne is there to protect her from Yami Marik
Mai Anzu doesn't likes Mai that much, but Elayne does. She and Mai are best friends, they love to shop together. Elayne is like a little sister to Mai
Duke nothing special
Pegasus She won't ever forgive him for what he'd done to her and her family. Pegasus tries to make it up to her, like making two special cards just for her, but she can't forget what happend
Shizuka She might not be a long time around, Elayne and Shizuka are quite close
Rebecca It makes her laugh to see Rebecca jump on Yugi while Anzu gets mad