Right now the manga seems to be looking at what happens when a normal person tries to stick with the martial arts world.
At some point the normal person is bound to get kicked out unless he/she receives training from a master, but it seems that Ukita has overstayed his welcome. He's been supported by his friends for far too long, and the mangaka clearly wants him to be around whenever Shinpaku does something, but sadly as he is right now he's useless.
Kenichi has yet to experience the death of a friend (I don't count Apachai at all), and I think something like this is critical for his development. Will Ukita end up being used for this purpose?
If Ukita don't find a master who could learn some techniques so that he improve his level, he could died indeed.
Howaver, Kushinada would be perfectfor train Ukita, they have the same kind of martial arts.
Nah not gonna happen you people seem to forget what kind of manga we are reading. So far on the entire course of the history we only had 2 deaths and both were bad guys (kanou shou and the masked master). If they brought apachai back from the dead in such a biased way you can be the chances any of the good guys to die are slim to none.
I believe Ukita might actually get some training later in the manga as he really needs a decent power-up in order to not be useless like a child as he is now.
he needs if not to win against Yomi, but at least he needs to not be protected all the time. I believe he can find a Judo Master and as well he might be trained a bit by Akisame. Of course it's not precisely the same type of martial art, but still it's better than nothing.
P.S. I don't think he will die. This manga just doesn't kill good guys, especially children.
I think he'll find someway to defend himself a little better we've seen his spirit still wan't strong enough to even beat Kisara's GF. That or he's gonna take a back seat in the fighting which he should he hasn't made very much improvement since he almost got cut down...Maybe Freya's Grandfather may teach him a thing or two but he's becoming annoying and a liability to his friends at this point.