Alex Bird ("Imposter")

Introduction
"Alex Bird" is a bird that features in the series Angry Birds: Yolkdust Crusaders, being a minor protagonist in Chapter 3: Mirage Motherland Minus, but the main character of Chapter 4: Metal Globe Run. This series features a rebooted version of the character instead of the original version, sporting an entirely new backstory and design.

Appearance
Alex's design is a lot more akin to Red's than his original design, most apparent with the size and positioning of his head feathers.

In the reboot, Alex Bird's colour palette has been switched, sporting a bluish-grey body and a silver belly. His beak has also gone from yellow to orange.

History (Chapter 3)
Alex was created inside of a lab, of whom have a certain connection to an evil company that takes the data of naive younglings for "examination". One day, one of the workers of the lab went rogue, resulting in the culmination of all the stolen data in the form of an Angry Bird - "Alex Bird".

The company eventually realised, firing the rogue worker, and setting Alex free, but due to a massive oversight on their behalf (too good to spoil here lmao), they reveal their true identity - TackTic

Not being taught anything during his time in the lab, Alex turned to delinquency, and with the data he was made up of, he was able to outcringe anyone who tried to stop his illegal ways. One year later, TackTic find Alex, and knowing how much of a threat he is, capture him while he's asleep and brainwash him. Unfortunately for the company, the brainwashing goes wrong, turning Alex into a the most legal bird in existence, albeit his prior abilities and memories gone. In a matter of weeks, he is eventually entrusted by the "Moderation Team", a group of people who aim to prevent crime across the island. Rising up the ranks, he is also given a Diamond Sword.

At the start of the "Go Go Zeppeli!" arc, he meets Go Go Zeppeli Bird, who arrived at the scene after hearing the bird he was meant be protecting had their data stolen by TackTic. He confronts Alex, knowing his origin and connections to the company.

During the battle, he begins screaming in a fit of rage at Alex, triggering Alex's legal senses, awakening his stand, Sulky Seas. He uses this newfound ability to find out why Go Go Zeppeli is here, eventually forming a truce, and somewhat of a friendship.

In the fight with "Koibii Euros", Go Go Zeppeli is taken by surprise by the villainous "Gelatin Marx", and Zeppeli's stand, Sphere Smasher, activates and accidentally hits Alex, putting him into a coma for the rest of the chapter.

At the end of Chapter 3, Alex is freed by Mighty Eagle. Now on a quest to find his good friend, he remembers that he was participating in a race called the "Metal Globe Run", and decides to take part to find him, starting Chapter 4.

Pre-Brainwash
Before being brainwashed into legal, Alex, being comprised of the lab's collected data, was able to take any bit of data that had been collected by TackTic, and replay it in front of an enemy. The "cringiness" of some of these videos were so extreme that it could even make the most oblivious of people wince. Alex would use this opportunity to attack or escape while they were still wincing.

Moderation Team
After proving himself to be a loyal member of the "Moderation Team", Alex was given a Diamond Sword for all his efforts. While he never used it much, it showed his status to the citizens, and when used, was a force to be reckoned with.

Stand
Alex also eventually gains the stand "Sulky Seas". This stand allows Alex to replay events from people's memories and store them into CDs. It is also implied that he can also steal people's memories, but this ability has never been showcased, probably due to Alex's legal (and moral) tendencies.

Trivia

 * An older draft of Chapter 3 mentions Alex having parents, despite being made in a lab.
 * Fan theories suggest that due to Alex being brainwashed, he is unwilling to be legal. However, since his memories were also taken, this may not be the case.
 * Due to the controversial backstory of Alex being illegal, this rendition of Alex is also seen as an impersonation of the real Alex Bird (well technically speaking he isn't the same as the original).
 * His opinion on Bosnia, while never revealed, is assumed to be legal.