who is couple of mikan?

Natsume. In the manga, chapter 50 page 26-27,Natsume kissed Mikan. And in chapter 97 pages 6 and 7, Natsume a dit that he would protect Mikan, the person he loves.

natsume of course!!!

hyuga natsume of course.gakuen alice is the best with the lovely couple mikan and natsume.my number 1 the best animé of my life and the first animé that i like so much.the best story ever.

i think
NAtsume

hyuga natsume kun

natsume kun of couse.. :)

the all high and mighty (and handsome, too)

Natsume Hyuuga.

natsume

Of course it's Natsume Hyuuga. He gave Mikan his alice stone, which mean that he l’amour her

Natsume hyuuga the and only fated for her :)) <3

salut !
It's a bit...complicated because Mikan is really shiny (if I can say so ?) so Ruka and Natsume ended up falling in l’amour with her.
Natsume lives in the dark so Mikan is like his "light" just like Nobara.
When Ruka understood that Natsume needs Mikan plus then he does, he gave up on her but he stills loves her.
In the end, both want to protect Mikan,but Natsume always act on his own and it makes his lifespan decreasing, even though he promised Mikan that they would be happy forever together par exchanging Alice Stones.
So I think that Mian and Natsume are in couple because they made the exchange thing.

Of course it's natsume