Flain

Flain is the leader of the firey Infernites tribe.

Physical Appearance
Flain's body is mostly red. He has a rounded head with an eye on each side. Most of the time, his eyes are half-closed. On top of his head are three prongs, the outer two dark red with the middle prong being red with a darker red rectangle on the top of it. Most of the time, this houses a yellow-orange fire that is constantly burning. He also has a beak. He has a body that widens at the end with a light grey collar-like piece at his neck. He has two slender arms with pincer hands. On his wrists are dark red triangle-like covers that taper down. He has grey legs with red feet that have two white claws on each. He also has a rectangular hatch on his rear.

Personality
Flain is the intelligent, brave, and relaxed leader of the Infernites. He is very easygoing towards everyone he meets and is extremely friendly, sociable, on-going and nice when it comes to most of his Mixel brethren. He also very smart and resourceful in challenging moments. However despite being an overall nice guy, he does get infuriated at certain moments, causing his head to instantly catch fire.

Abilities
Whenever angry, upset, mad, overwhelmed, or thinking too hard, his flaming head blasts powerful fire. His eyes can also catch on fire without being incinerated. Flain is able to launch fireballs from his head at opponents and is able to melt the ground around him to form a pool of lava.

He may also be quite durable, as seen in Coconapple, where he survived getting caught up in a large explosion caused by the Seismo and Zorch Mix, which only appeared as a minor annoyance to Flain.

Due to being an Infernite, Flain has incredible heat resistance, being able to have his head constantly house a fire and take a bath in lava with no negative effects or visible pain.

Calling All Mixels

 * Molten Mortar: Flain launches a giant fireball that creates a small explosion and does area damage to any enemies within the explosion's radius upon impact with the ground.
 * Lava Lake: Flain forms a pool of lava that burns away at any enemies who come into contact with it.
 * Volcanic Volley: The fire on Flain's head erupts like a volcano, launching a barrage of fireballs that do massive damage to any enemies close to him.

Early life
Little is known about Flain's past. However, at one point in time, he became the leader of the Infernites tribe, becoming a very important member of the Mixels species in the process.

First adventures
Flain once ran late to a party that was being held that many other Mixels attended. Consequently, this ended up preventing him from being captured by Major Nixel. It was then up to him to save the remaining Mixels and take down Major Nixel. ("Calling All Mixels")

He managed to get caught up in an explosion caused by the Seismo & Zorch Mix when he was trapped with the Mix inside a lava hot tub, and the ensuing pressure caused a large explosion that tossed them all in the air. ("Coconapple")

He, along with the other Infernites, formed their Max to compete with the Cragsters Max and Electroids Max over the last Cookironi in the box, only for it to eventually end up crushed. However, they then found a single Nixel with a whole box of them, and the chase continued. ("Cookironi")

To help Vulk's problem with the clogged lava shower, he ended up suggesting that all three Infernites Max together to fix it. But however, they accidentally burned Teslo's mouth and Krader's rear. ("Hot Lava Shower")

He invited Seismo to the Magma Wastelands to enjoy a lava slide, but their fun was quickly interrupted by an army of Nixels. They lost their Cubit for a moment, but managed to retrieve it, forming the Flain & Seismo Mix to defeat the Nixels and upgrading their lava slide in the process. ("Nixels")

He and Krader were once stuck on one side of a river, while the other side had a party that they both wanted to reach. He suggested that the two of them Mix to reach the other side. Despite Krader's apprehension, they both did, and accidentally end up forming a Murp. Their second attempt became a successful Mix, but they ended up destroying the party and burning everyone. ("Murp")

He was the only Infernite to take interest in Rockball, and ended up teaming with Krader to play it. After accidentally setting the rock on fire, the two of them created the game Mixelball together. ("Rockball")

He and his Infernite brothers came across a patch of Plowers and took one each, leaving one left. They decided to Max to share it. ("Infernites MAX!")

He went Snowboarding with Krader, Flurr, Slumbo, Kraw, and Jawg at one point, teaming up with Krader. When the two of them tried to Mix on their turn, they ended up creating a Murp, causing the two of them to plummet into the half-pipe and freeze themselves. ("Snow Half-Pipe")

His attempt to relax with Slumbo by listening to music in the Farmlands was ruined by Chomly and Jawg's game of Log Toss knocking the two in the head. In retaliation, Flain burned their log to ashes and went back, unaware that Chomly placed a Cubit where they would easily touch it. This caused them to Murp and end up being used as the replacement log. ("Fang Gang Log Toss")

Search for the Rainbow Cubits
One of Flain's most noteworthy adventures began during the annual Mix Festival. Thanks to Zaptor eating all of the Hamlogna Sandwiches, he went with the other tribe leaders to retrieve more. This ended up saving him from being Nixed by the Mega Nixel Mixel Nixer, but consequently forced him to go on a journey to Mixel Mountain to retrieve Rainbow Cubits.

While the leaders were being attacked by a swarm of Nixels on the peak of the mountain, he and Gobba created a Mix to defeat them and brought the cubits back to the festival, just in time for the remaining leaders to arrive at the party. ("Epic Comedy Adventure")

Further adventures
A picnic Flain was having in Mixel Park with Chomly, Lunk, and Zaptor was interrupted by the Wiztastics promoting their magic show, while the four of them just stared at the trio in disapproval. ("Murp Romp")

Flain, Seismo, Volectro, Slumbo, Chomly and Kraw argued about who should use a Cubit first, while a Nixel snuck up on them. As Slumbo decided to flip a coin with a boulder, he was crushed by the boulder, so Flain and the other Mixels went home. ("LEGO Mixels: Activity Book")

Flain was one of almost all of the Mixels who searched and fought for the Mixamajig, and then captured by King Nixel. He Maxed with his branch of the Infernites in order to defeat him, and Mixopolis was revealed by the Weldos soon after. ("A Quest for the Lost Mixamajig")

Trivia

 * He is the leader of the Infernites. He also somewhat acts as a leader to the Mixels species as a whole.
 * His head resembles the Red Robot Sidekick from Galaxy Squad, another LEGO theme.
 * Like the Cragsters, he enjoys Rockball.
 * He may know how to speak Spanish, judging by how he calls the Cragsters his "compadres", which is Spanish for "friends".
 * Out of all the Mixels, he has made the most Murps seen on-screen; most notably the Flain & Krader Murp.
 * His beak is almost never shown entirely straight-on, always having a slight angle to it, even when facing straight. The only times he was seen from a straight-on angle with his beak was from a distance in Hot Lava Shower and close-up in Rockball (episode).
 * A static image of him crossing his arms was used in European Cartoon Network YouTube headers, cropped down to fit in a square, and later on used as part of the "Check It 3.0" branding for Cartoon Network in the US. The full version of this image was never publicly released.
 * He was falsely listed as a character in Unikitty!. This was likely due to a Wikipedia editor modifying the site's article for the show, something other LEGO news websites picked up as fact.
 * Various statues of Flain exist in the Magma Wastelands, as shown in Calling All Mixels.