Here's the second one.
You're not very deep into the story just yet, so it's difficult to get an idea of the story's themes or the characters'personalities, but it's a solid start. I read the whole thing.
So, my thoughts on this:
I like what we've seen so far. The bald runner is awesome and I hope he gets a lot to do, because he's like the perfect mix between a serious mentor figure and a downright meme. I mean, he's a muscular bald jogger that kicked something five times his size into the air and it exploded. What?!
The girl is the protagonist, I'm guessing. So far, she's likable. I tend to dislike the cocky 'I take runnecessary risks and I'm proud of that' or 'I'm the newbie but I'm always right' characters, so her first interaction with her team made me worried she'd be one of those characters, but she quickly leaves that category by actually making an attempt to work with her team and listen to the more experienced runner, so props for that.
The third character hasn't had much to do yet, so i'm curious for his future
Well. there hasn't been much yet. It has a good start, and it leaves you wanting for more. The action scene was also well paced and you get a clear overview of what each character is doing at any given time, so that's a definite bonus.
This is probably the part that makes Runner stand out the most. This concept is both unique and amazing. The idea of messengers treading through dangerous territory is as old as society itself, but dressing them up in modern sports gear and giving them abstract magical powers, now that's a combo I haven't seen before. It makes for a very interesting aesthetic and I am curious what exactly these 'mana wells' are capable of.
The art is definitely a strong point, but also the point that could use the most improvement. Soft shading could help establish a sense of depth in your scenes and characters, as I felt that was mostly what was missing. This is very noticeable in panels like the last panel on page 5. Playing around with angles a bit more could help during action scenes, but I feel you are doing that really well as is.
I think your story could benefit from a little more stylisation. This is most noticeable with the faces, as they tend to change proportions from time to time. This improves very quickly, but I do think some experimentation with drawing the faces in ways that feel natural to draw without thinking about realism could help solidify the style.
Besides that, the characters have very emphasized muscles and anatomy. I think that's going to be one of the most important aspects of the art, considering the sportswear aesthetic. Here, some more stylisation and exaggeration could really help set the characters apart, rather than trying to draw them as anatomically realistic as possible.
Think of popular comics and manga, notably Dragonball, Jojo's Bizarre Adventure, Baki... Some of these are known for having really well drawn muscular figures, but when compared to an anatomical chart, some things wouldn't add up. Because they're exaggerated in their shapes and proportions, they feel realistic without being so.
I do think you're definitely on the right path with this, with a lot of thought going into the poses and shapes of the characters'movements. Like on page 25 panel 2. (The faces also work really well on that page). On the same page though, in the last panel, the character's arm seems a bit off. Exaggerating the perspective of the punch and the swelling of his muscles and the size of his fist could mask smaller errors like that.
All in all, a very strong start and very promising.