hmmm.... seems plausible, however I'm not really convinced, if you could find at least 1 more example to have a more concrete idea, it would be appreciated.

[You can clearly tell when a trope was made on the run just to fill the daily quote, don't you?]

A symbol of coolness, as for the colour, since is a prime tone it highlight at a first sight, so in combination, this examples wear it as such to highlight how cool they are.

(Sources in ALT)

T.J. - Recess (American)

Brick - The Powerpuff Girls (American)

Kevin - Ed, Edd and Eddy (American/Canadian)

Lana Loud - The Loud House (American)

Backwards Red Hat Wearers

Many take this warriors of other times as mythical, and combined with the legends an myths from where this originated, is not surprising some felt inspired and birthed this trope.

This examples are samurai (Most time Ronins, wandering samurais) with supernatural properties.

(Sources in ALT)

Jack - Samurai Jack (American)

The Ronin - Star Wars Visions (American-Japanese)

P.I.X.A.L. - Ninjago: Masters of Spinjitsu (Canadian/Danish)

Scarlet Samurai - Danny Phantom (American)

Supernatural Samurai

A persistent role in the entertainment world, with a mix between news and gossip, this examples take the spotlight as a guests receiver, stories sharer and diverse topics narrator.

This can come in any medium of communication, Cable, Web, Radio, Holograms(?), pick your poison.

(Sources in ALT)

Space Ghost - Space Ghost Coast to Coast (American)

Phineas Flynn - Phineas and Ferb Take Two (American)

Joel - Hey Joel (American)

Dee - Producing Parker (Canadian/Philippines)

Talk Show Host

The examples are genetically engineered bio-individuals (Most times), designed for combat, and more or less Conquest and/or Annihilation.

Created or genetically modified to follow order, self-awareness is implemented for higher adaptability, likely used to bypass the first.

(Sources in ALT)

Cell - Dragon Ball Z (Japanese)

Shadow - Sonic PRIME (American/Canadian)

Atom Eve - Invincible (American)

Xenocite - Ben 10 Franchise (American)

Bioweapons

Some say is to compensate their extra life count, this call it unfair anyway, other that they should take care of their steps, and call that unfair too.

This feline examples won't have much chances to have a good day, perhaps so little many would believe they spread bad luck.

(Sources in ALT)

Gumball Waterson - The Amazing World of Gumball (American/British)

Tom - The Tom and Jerry Tales (American)

Sylvester - The Looney Tunes Cartoons (American)

Mr. Blik - Catscratch (American)

Unlucky Cats

Notorious for being a brilliant leader as a general in the Roman army, leading successful campaigns against Gaul and other enemies in ancient Rome, and his brutal assassination by a group of senators.

The leaves feature in his portrayal and profile is called a Civic Crown.

(sHOWS IN alt)

Shakespear The Animated Series (British)

Asterix and Obelix: The Big Fight (French)

Peabody and Sherman Show (2015) (American)

Time Squad (American)

Gaius Julius Caesar

Lessons and scars are brute and raw lessons in life, showing progression as a person, but some get to become long lasting, like this cases.

This examples suffered a loss in their sight, most times shown by wearing an eyepatch.

A full recovery or having a prosthetic may occur.

(Sources in ALT)

The jojo's ones.

(Also, the Lanterns has per colour)

Enzo Matrix - ReBoot (Canadian)

Jean-Pierre Polnareff - Jojo's Bizarre Adventure Franchise (Japanese)

Tabi - Camp Camp (American)

Joshua Maverick - Clarence (American)

Lost an Eye During the Show Run

Top genre alongside Rock worldwide, yet for what rock is for boys, this genre fits girls like a globe, and for such a perfect presentation for a show premise.

Most likely to come with their own discography, but depends if added as a tie in marketing for the show or vice versa.

(Sources in ALT)

Can you list them?

LoliRock - LoliRock (French)

Franchouchou - Zombie Land Saga (Japanese)

Puffy AmiYumi - Hihi Puffy AmiYumi (American)

Jem and the Holograms - Jem and the Holograms (American)

Main Girl Pop Band

It's said that with time comes wisdom, and what better way to show it than with ancient object that come from pasts unknowns?

This examples are objects that choose the chosen of great deeds.

That this hold a degree of sentience or bounded to select the user depends on the show.

What do you expect

Stand Arrows - Jojo's Bizarre Adventure Franchise (Japanese)

Amulet of Daylight - Trollhunters (American)

NinjaNomicon - Randy Cunningham: 9th Grade Ninja (American/Irish)

Green Lantern Power Ring - Green Lantern TAS (American)

'It', The Chooser of "The One"

Adventuring out with friends can lead you to great places, but not any can find friends OUT of this World.

The amount and kids roles (Two of them being siblings, having a crush, treating the alien as a toy, so on) may have been inspired on a certain Sci-fi Movie of the 80's.

(Sources in ALT)

- MBC: Monster Buster Club (French/Canadian)

Zoe, Quigley, Rock and Ulev - Agent 203 (Macedonian/German/Italian/Hindi)

Yoki, Sam, Niko and Rocket - Jack (Singapore/Canadian)

Rob and Friends - Rob The Robot (Canadian/British/Singapour)

3 Kids and an Alien Main Group

Perhaps have to much in common or know for so long that no matter their social status, they will get along.

That the excess/lack of popularity doesn't rub into each other is either for their relationship being of a close circle or for their reputation being out of their control.

(Duos in ALT)

Leonard Helperman and Scott Leadready II - Teacher's Pet (American)

Pepper Ann and Craig Bean - Pepper Ann (American)

Yoshinobu Kubota and Sakamoto - Haven't You Heard? I'm Sakamoto (Japanese)

Birch Small AND Raffi Rodriguez - My Life Me (French)

Loser and Popular Kids Duo

There's a say that when sometimes occur in almost an instant it "happens in a flash", or if shorter to 'pop' up, like bubbles, and with transportation becoming faster and faster by the day, you can connect the dots.

That said user get or not wet out of it depends on the method.

(Sources in ALT)

Tee Zeng - Kung Fu Wa (French/Chinese)

Emily - Hasbin Hotel (American)

Mercat - Gabby Dollhouse (American)

The Bubbler - Miraculous Ladybug (French/South Korean)

Bubbles Transportation

The protagonist, but wish not, as this examples are a dark side that reside in the back of their physique.

That said self can gain conscience of their own, or even their own anatomy depends on how the protagonist deals r or is prepare to embrace said self as a true part of them.

(Sources in ALT)

Nega-Timmy - FairlyOdd Parents (American)

Dark Spyro - Skylanders Academy (American)

Bill Goodwin - Fangbone! (Canadian)

Yōkai Mode!Inuyasha - InuYasha (Japanese)

Alternative Evil Self of the Protagonist

Since this advanced and reliable mechanisms are likely costly to produce, one needs a way to, cut corners (get it?) and it Works! Look at them go!

This examples are anatomically bodied robots with chests for heads.
Most likely represented as an eyeball with limbs (if barely).

(Sources in ALT)