It took me some time to get to where I am now, and I’m still not the best at it
What I can say is that you should check out animations that you enjoy, slow them down, and analyse their techniques
I wouldn’t say copy them completely, but if they’re doing something good that you like then try to see if you can incorporate that into your own animations

I guess you gotta have that spotlight, huh?
¯\_(ツ)_/¯

You should ask him

Thinking about it now, I said before that I wanted him to look more like a magician
But, I’m not a big fan of that anymore, so it’s new idea time
Thanks to the mask, Mellow will physically age slower with that decrease in aging increasing as he lives, so I won’t expect him to look much different physically
I think he’d probably stick more to the formal wear, but modified by you, of course
The Hoodless varient would be the one he primarily sticks with
And I kinda want him to go with the interdimensional private detective route, so maybe give him a badge or a pin or something along those lines with his trademark M on it
Maybe you should also make his eye colour more darker, or a slight mix of dark blue and purple
You’ll find two stray nodes near the middle of his face, just above each eye
They’re movable, so just turn the thickness to a value of 1 and you get a Mellow that’s seen far too much for a kid his age

Tl:dr; make him like dis guy keke

As for Comet, he’s probably fine as he is
Maybe giving him Mellow’s top hat would be pretty cool though

I’ve made updates to Mellow since we last talked, and stuffed Comet in there too for good measure
Feel free to do your worst
https://drive.google.com/file/d/1GL0CxRMdavI-m49OAJm1haMHDO1cBBq3/view?usp=drivesdk