in a way yes, considering they were childhood friends and there were hints in the anime :) plus, think about it, he's in the afterlife now and so is she, meaning more of a chance to be together as friend like Mahado and other friends and maybe Teana, the mystery character who is not mention in the series but in game.
Yes, Yami likes Mana.
It's unknown who he really likes, either Mana or Ishizu.
No, Mana and Atem are just childhood friends. Theres nothing more nor nothing less to it.
Maybe, in the anime, they both cared for each other a lot. Though, none of them mentioned their feelings for each other. To this day, fans have made pairings for them called vaseshipping.
Goku is stronger in fight than yami but yami is stronger in dueling.
Hisila Yami was born in 1959.
Yes, he loves Marik, his girlfriend.
Hisila Yami was born in 1959.
Yami Lester was born in 1949.
Yami Quintero is 170 cm.
Yami Gautam is 5' 5".
Yami Qaghan died in 609.
Mana Mana was created in 1986.