This is why this manga reminds me a lot of Naruto. Despite Yuno and Sasuke have a lot in common considering skills, appearance and characters (Yuno is much more innocent-hearted though), another thing is that they tend to disappear in the storyline and just come back with even higher skill level without readers knowing that much of what they were doing.
True, but I like Yuno over Sasuke because Sasuke is (atleast in my opinion) rather petty and vindictive which I think is a bit annoying while Yuno is competing like friends do. I know Sasuke's back story explains why he behaves as he behaves but I still find it annoying.
I just really want to see how their relationship is without all the rivalry (?)
It's like Yuno is only there as a competition to make the main character stronger. But Yuno's character has so much potential. (along with the grimoires, of course, so many unanswered questions there.)
I wonder when they'll explain more about Aster's grimoire. Why is magic canceling and what is its history. (like the elder who wielded it)
Plus I want to see how Yuno is evolving. He rarely shows and when he does, he and aster just try to one-up each other.