Now, these are MY opinions, don't take them too seriously.
Okay so first ship,Arlo X Elaine.Now, they were some of the few that first found out about John's ability. I find that they would make a really good couple. The shipname is Arlaine.
Next one is a bit far-fetched but it is John X Claire. I don't know why I think that it's a good ship, but I just do. The idea of them being together entertains me, and I spend hours some days thinking about things like this. In my imagination, John is Shown how to run the school easily by Sera and Arlo after Sera shows him what he's become. He will see he is the "Monster everyone makes him out to be. Then, he will meet up with Claire, and apologize. For some reason I feel like something like this will happen
Next is my favourite out of them all, Isen X pen. I wrote a thing on my laptop account talking about why Isen X pen should be a like popular/real ship. It talks about how he will spend hours picking out a pen (as you do) and in The first episode, we see him fight blyke over breaking part of his pen.yea... I'm not going into too much detail on that.
Next ship is Remi X Blyke. Many people ship this. I found that both of them wanted to become some sort of superhero and they would make a cute couple. Like, they agree on a lot of things and it's just common sense to some people that they are the perfect couple. Now, some people may say, "no! Arlo X Remi is better, they have nicknames for each other!" And yes, there is that but they could have known each other for quite a while and just come up with those nicknames, Remi has pink hair and Arlo can be an asshole at times so.. that could be the reason we all know that Arlo really idolized Rei so... Remi and Arlo might have known each other from when Arlo went to visit Rei or something.
Again, these are my opinions, please reply and tell me more ships, and why! Also, if you disagree with any, let me know. I would love to see others opinions on these