What if Loki became Akira's new student ? As of right now Akira doesn't have a main student since Sho died. I think he would fit as his new disciple because he practices karate and is also talented(Not as talented as Kano, but he has potential). And if I remember they both use Nukite a lot in attacks.
Doubt it. He's already got those 2 other people, and there's no reason for Kenichi to have to beat down a disciple of his again. There's been too much Hongou lately anyway.
I doubt akira ever had a "main" disciple. Obviously kano was the strongest of his disciples and the leader of yomi but would that make him his main disciple in his eyes? Odds are akira valued all of them the same.
The Princess of Tidat.
Well, the princess seems to want a little more than training from Akira if you catch my drift but I would have to agree with kkck that they probably are not his actual bodyguards. However, they idolize him so much they naturally feel compelled to protect him and follow his orders. I don't think he valued all three of them the same; I was under impression he and Akira had a very special bond since they've been master and disciple for so long. I don't see how anyone can argue that he wasn't the main disciple if anything he was clearly the most important. Now I don't think he'll take on another disciple; he'll probably continue to train them and later they can battle it out for Sho's vacant position in Yomi.
Well, for me the issue is more about akira's character and perspective on the whole thing. I don't get the impression that he would be the type to have a preference over his disciples. He is a straightforward guy who cares about his disciples, I don't think it would be consistent with his character to take preference over any of his disciples. Within the mid term I don't see how any of them could take kano's position in yomi though. The two of them already lost to kenichi lol.