Nice, very cool idea. You are missing some stuff, right now the costumes, the theme doesn't feel very solid. Something to define this character, maybe shapes, tech.

You need to find a balance if her purpose is to heal and provide support or just do massive dps but little healing. If she is a pilot, look at some real world references of a pilot, the equipment, the gadgets, what do pilot carry with them. If she is quick, sleek look at references of athletes that wear sleek, tight clothing( like those winter Olympian speed skaters).

Her mech is also missing a coherent theme with her. Sometimes too massive of a object can overshadow something. Study a bit, learn at how things work in real life. There is no black or white answers, all of the above are pretty grey, but these are just my personal preference and suggestions.

I didn't mean it as rude, but it seems like you're recycling some of Marc's design language in your own drawings. I really want you to think critically about the design; really give her a function. Sometimes simplicity is better, ya know? Don't get too caught up in the details.

I know it can be kind of intimidating to see so many artists pouring a lot of detail into their work, but its also not a bad move to try to go for something simple and Immediately recognizable as well. Like @mdaven_art Explained, its easy to get caught up in details.

give some examples of characters you feel aren't forgettable and predictable

What helps me to try to think of a "Memorable" character is to think of a pretend franchise for them to exist in. I think, "Is this a character for children, teens, or adults?"
Consider:
A character intended for children should be easy to draw, and remember. They're cute and empathetic. (Example: the Character cast of steven universe. And even more memorable, Pikachu.)
A character made for teenagers should be relateable, more realistic but not jam-packed with details. They should also be teens themselves. (Avatar, Teen Titans, and most anime)
A character made for adults can be really hard to nail down in a few words, but they usually aren't afraid to be ugly. Most adult cartoons have really ugly characters, but that's a key thing to consider. You can remember an ugly face because they have unique features. (I hate to drag them like this, but Roadhog and Junkrat are pretty ugly but they are memorable. their ugliness is part of why a lot of people love them)

Lastly, find a theme to draw your character with. An example of a character with a theme would be Yugi from Yu-gi-oh. He's composed of primary colors, sharp angles, and Ancient Egyptian aesthetics. Its so hard to Forget yugi because of his hair! He's Iconic.

Sorry I went on a big 'ol speech, but I feel like this advice might help gain a better understanding of what a "memorable" character is.
TLDR:
Make up a "Target audience"
Pick a few themes you like, think of a character based on the themes
Create that character with the intention that someone can describe them without actually naming that character. If someone likes your character, but doesn't know their name, they can go to google and type in "Bald kid with blue arrow on his head "

Anyway, i've had like, 0 sleep so if this is all in a foreign language I apologize.

Hope this helps!

I can really see the Miyazaki strongly influencing your characters
Great work! Like the design themes alot <3

Damn this is active and i don't think i've even seen this thread, how'd that happen.

I like the progress you seem to have a handle on this, i like the wrist shielding.

Can't offer anything but praise and support, continue it's looking like a great contender.

Hey Cool Crew but I like the more finished characters more.

I feel you making a whole crew. isn't this contest about a single person illustration.
Make one character good with a maybe one antagonist and some environment.

I also get fewer feedback but I think it because there are way more threads. Really hard to keep up with that. And 2D are way more threads as in 3D.

I like the post before 5 days with "So here is how the shield would work for my characters"

the post before 9 days with Warning post might be a little long...... where I like B,J and especially M
the Alliens just N and O
The hole sheet 1-7
I liike frisures C,G
also 4 from last sheet

I like the look you have going for the male characters! The top right and bottom middle are my favorites.
I think you could try experimenting with female characters based off of their designs. The top right would work well with a female character given that its really rare for people to make bald females. It would help a lot to make them stand out.

I like the look of the female character you have so far. You could give her a yellow or an orange jacket. Something about the Blue and green together is a little... Hmm. I can't put my finger on it, but a complementary color scheme might work better?

The martial arts hiphop kinda looks like Genos from One Punch Man! haha I love the design of yeah the hiphop, it's simple, s=has some busy parts and some resting places for the eyes. Try to combine that with the bottom middle's head and leg part I would love to see that! Great designing skills man!

In my opinion the knee pad takes away from the hip hop theme you were going for.

I would suggest maybe some graffiti style designs on his pant legs.

I like the color scheme you chose, but the top of the torso being as bright as it is distracts from the face a bit.

I'm liking this so far.
Keep it up!