tl;dr: A Shounen action series that has a really arbitrary plot and pretty underdeveloped characters, but has enough charm to make it a really enjoyable ride. 

This manga is incredibly messy in a lot of ways, but it’s still an immensely enjoyable ride. The story feels really arbitrary. There are a lot of things that are incredibly forced and pulled out randomly in order to push the plot in a certain direction like characters suddenly appearing or random mechanics that pop up once and are never seen again. There were some scenes that were clearly supposed to indicate or foreshadow something, but the author decided to change where he was taking the plot and hence what was hinted at never materialized, these elements being completely ignored or twisted in a ridiculous way to keep things consistent with the new direction. And it kind of bugs me that it pretty much tries to make every villain likable in the end, with some even getting instant redemption, which seems incredibly forced and undeserved a lot of the time. So, the manga definitely lacks consistency in terms of the overarching narrative and plot threads. Still, even though it’s really messy and chaotic, it’s still really enjoyable. The main characters may not have all that much depth personality or character development wise with some rare moments being the exception, but they are interesting, amusing, and really likable, making them really easy to get invested in. And though it’s incredibly subtle for pretty much the entirety of the manga, the relationship between Haru and Elie is really sweet and great to see progress. The story is random, but it manages to capture the sense of adventure really well. Plus, the randomness even feels like a plus at points. The plot starts off really rough, so using the randomness to run around these issues and not worry too much at being constrained by them certainly helped the plot. Some of the crazier overarching twists were built up pretty well and were great when they were fully revealed. And eventually, once you get used to the arbitrariness, it was pretty awesome to have something major happening constantly. It allowed things to move at a really fast peace, and it let the author do a lot of awesome things that would otherwise be impossible if he was trying to keep the story more consistent. The ending very much embodies both the negatives and positives of the randomness, it is incredibly forced and arbitrary, but in a way that does right by its characters and makes sure to hit all the right notes to feel really satisfying. The action is fast paced and epic enough to be pretty awesome. Powers are interesting and really varied, and though that leads to a bunch of consistency issues, it works well enough. About half of the time the end of these battles despite the powers simply comes down to the power of will, friendship, and all that, but these scenes are well written so it doesn’t feel like too much of a drag and often actually feels pretty awesome. In addition, there's enough of other elements that don’t ever make things all that complicated, but are enough to keep the combat interesting and varied. I also really liked the atmosphere all the way through, with it being incredibly optimistic and keeping up a steady stream of humor between the serious moments. The art starts off being not all that good, but by about half way through it evolves into becoming good, especially in terms of character designs, and keeps that up all the way into the ending.