Lui Shirosagi

"I'm gonna tear your dreams to bits!"

is a character appearing in the anime and manga series, Beyblade Burst. Lui is the main antagonist of Beyblade Burst. He also acts as the secondary antagonist of Beyblade Burst Evolution, the primary being the Snake Pit Organization. He is the most skilled blader in the series, and as of now has won 5 National Championships in a row after defeating his two greatest opponents, Valt Aoi and Shu Kurenai. He is also the best of the Supreme Four and a member of team Ride Out. His current Bey is Nightmare Longinus Destroy. He is the only Blader to defeat Free de la Hoya and thus, he is currently the World's #1 blader.

Appearance
Lui is a rather short boy with light teal flaming hair and violet eyes with a black ring around them. He wears a puffy white scarf that reaches down to his knees, a teal dress shirt with a dark purple tie, and black and blue tiger striped pants with white boots.

Personality
Lui is aggressive and quite rude. He owns a reverse-rotating dragon bey - Nightmare Longinus, which is similar to Ryuga's L-Drago and Sakyo's Ronin Dragoon as his bey also has metal headed dragons which rotates to the left. He also may be a sadist as he is seen to inflict harm onto Shu multiple times by creating the scar on his face, broke Sprzyen and damaging his recovering shoulder.

As shown several times throughout the series, Lui only battles opponents that he deems worthy and is not afraid to voice his opinions on others, especially if they fail to live up to his standards. However, it is hinted that he is able to tell whether or not a blader is in sync with their bey. For example, he commended Gabe for having connected with Gaianon and this could be the reason why Lui called Valt a terrible blader; he was able to see before Valt could that Valtryek had not yet at the time unlocked its true strength.

Lui does not like being cheered on by his peers, and apparently does not believe in good sportsmanship. This is demonstrated when he criticized Shinki Mikuni for admiring Shu's skills, and later Gabe on congratulating Zac for beating him. In addition, he only wants to win with his own skill, as shown when he won the final match against Valt of the Individual Tournament due to Valtyrek accidentally bursting by itself and demands Valt to have a rematch, which the latter refuses to much to Lui's anger and dismay.

Beyblade Burst
Lui is a member of Team Rideout, led by Gabe Brunai and is one of the Supreme Four. According to Gabe's memories, Lui was a transfer student and attended the same class as Gabe. Despite usually keeping to himself, he often went to observe Gabe while he was beyblade training and developed an interest on him and later joining the bey club.

He is first introduced at Zac's party as a "special guest". Upon his arrival he watches Zac and Valt's battle. After Valt loses the fight, he calls him a terrible blader. He respects skilled and talented bladers, but he is quite rude as he injured Shu on his eyes in the championship battle by knocking out his bey on Shu's eyes. He has won the 4th championship very easily by defeating Shu without any loss.

In the Finals of the Team Battle Tournament, Lui finally makes an appearance, which he never did in the past. He would later go up against Valt and win, with one instance involving Valt managing to tie in a match against him (something that no one had ever achieved before).

Later in the Individual Tournament, Lui easily defeats all of his opponents, including Ken, without any ties or losses in his battles. He also takes an interest in seeing Valt's battles, realizing that his skills are getting better. Lui once again faces Shu in the semi-finals, and wins when Shu's Storm Spryzen breaks a split second before Lost Luinor stops spinning. Lui eventually faces Valt in the finals, but is angered and disappointed when he emerged victorious after Valtryek Burst upon landing on a stadium dent it had created at the start of the battle.

Beyblade Burst Evolution
Lui first appeared during the match between the Raging Bulls and BC Sol. He later challenged Red Eye (who is revealed to be Shu Kurenai) to a battle. He completely crushed him with a Burst Finish. Irritated by this, Valt Aoi challenged Lui but he was also defeated by him as well. Later he challenged Free de la Hoya, the World's Number 1 Blader. After several ties, he defeated Free with a Burst Finish as well. He is the first blader in the series to defeat the reigning champion Free. Shu Kurenai and his new Bey, Spriggan Requiem 0 Zeta battled a hologram of him, ending with Shu's new Spriggan bursting hologram Nightmare Longinus.

Relationships
Gabe Brunai: Gabe is one of the few characters whom Lui shows genuine respect towards. As shown in a flashback, upon returning from living overseas, Lui would often observe Gabe while he practiced beyblade training, and the two eventually developed a mutual friendship between them. However, Lui still treats Gabe the same as everyone else, usually criticizing him for showing kindness and praising others.

Shu Kurenai: Lui and Shu have a bitter and intense rivalry that dates back to the previous National Tournament, where it is revealed that Lui was responsible for giving Shu his scar during their battle. Since then, Shu had been training hard to get over the disappointment and humiliation he suffered that day in order to beat Lui.

Valt Aoi: At first, Lui did not see Valt as a worthy opponent, openly calling him a terrible blader in his introduction and acting very cold and dismissive of him. However, it can be assumed that, as Valt advanced to the semi-finals, winning each and every one of his matches in the Individual Tournament, Lui eventually came to recognize Valt as a strong blader. This is confirmed when the two of them fight in the finals where he openly acknowledged Valt for unlocking Valtyrek's true strength (though he claims that Valtyrek is the one who unlocked his power) and expresses joy for able to fight him at his fullest.

Quotes

 * "Are you ready for your worst nightmare? 'Cause it's just getting started!"
 * "Prepare to meet your destiny."
 * "I know how afraid you are of losing. I can even smell it."
 * "Destroy it!"
 * "Impossible."
 * "I only battle opponents I deem worthy. No exceptions!"

Special Moves

 * Lost Spiral
 * Nightmare Boost
 * Metal Dragon Crush

Trivia

 * He is the first Beyblade antagonist who won the final battle against the main protagonist; in this case, Valt Aoi.
 * Like Ryuga and Sakyo Kurayami before him, Lui possesses a reverse rotation beyblade with a dragon motif, and also acts similar to them.
 * His last name "Shirasagi" means "white castle", likely a reference to him being the undefeated king of Beyblade.
 * Lui bears a resemblance to Damian Hart from Beyblade: Metal Masters. Both are blue-haired bladers with sadistic and ruthless personalities. Plus, they share the same Japanese voice actress: Romi Park.
 * He is similar to Vali Lucifer from High School DXD, due both having white dragon motifs, and his beyblade's color palette is very similar to Vali's Longinus, Divine Dividing. Furthermore, both of his Luinor Beyblades have alternative versions that are named "Crimson Dragon version", which is directly inspired from Issei Hyoudou's Longinus, Boosted Gear.
 * Lui has some similarities to Hades from the 1997 Walt Disney film Hercules, given that they are both antagonists with blue flaming hair and all sharp teeth.
 * Lui is also left handed.