User blog comment:Ebony2k16/Season 3 Sneak Peak/@comment-26564154-20160108020114/@comment-27404483-20160108213017

We don't know if Lexa's allowed a second as Commander. Since Costia was killed for being close to her I can see her not taking a second because she'd be worried someone (ice queen) would go after them as well.

It could be lika a Hope and Lightning relationship (for anyone who knows Final Fantasy XIII) where Lexa warms up to him and he becoming kinda a unofficial second. But that's only if he's meant to be a reaccuring character.

He's adorable I really hope we see more then one scene of him and Lexa training together.