Japanese Name: Kai Hiwatari
English Name: Kai Hiwatari
Age: 12-13 Season 1 Beyblade
Age: 14-15 season 2 V-Force (2002)
Age: 15-16 season 3 G-Revolution
Birthdate: November 9
Voice Actor (English): David Reale
Seiyuu (Japanese): Urara Takano
Eyes: dark red(season 1,3) dark brown (season 2)
Hair: blue in front, dark blue in the back(season 1) grey (season 2,3)
Family: Voltaire (Grandfather)
From: Russia
Characteristics: Four blue shark fins on his face(two on each side), Red shark-like fin wrist bands, white scarf and a cape.
Team: Blade Sharks (Former Leader), Demolition Boys (Former Leader), The BladeBreakers (Current Leader).
Bit-Beasts: Dranzer, Black Dranzer
Attacks/Defences: Fire Arrow, Flamethrower, Spiral Survivor (Defence)
Dislikes: Tyson, Beyblading(only blades for his family honor/pride), Chief, Voltaire, immaturity, shadowy groups, being part of any team, Tyson, everything living.
Likes: Ditching the Bladebreakers, Saving the BladeBreakers, Saving the BladeBreakers while doing cool poses, his scarf.
Strengths: Leadership, His calm unnerving intimidation powers, possesses a quick understanding Beyblade Strategies, knowledge about almost every Beyblade skill and trick, perfectionist.
Weaknesses: Teamwork.
Goal: Perfection.

WARNING...there are spoilers in some of this...

Bio:
He has been on 3 teams already...he is the leader of the Bladebreakers he has blue shark fins on his face.. his beyblade(bit beast) is a pheonix called Dranzer...it is very powerful...Kai is pretty anti-social...mysterious...he's tall...light blue hair in the front and darker blue in the back(kinda grey in other seasons), a white scarf.... and just look at the pictures xP

Kai is the former leader of the Blade Sharks, he is anti-social due to his horrible past and his evil grandfather. Kai doesn't trust anybody, except for Dranzer.

He was the former regional champion, before he was defeated by Tyson. Kai's strategy in battle is to take out his opponents quick before his opponent can do anything about it. Kai is usually a calm person, Kai has a lot of pride in beyblading and winning, what he wants most is perfection.

Kai's Past:

When Kai was born, his parents gave him to Voltaire, his evil grandfather that wants to take over the world...one day Kai sees black Dranzer, it was so powerful, lured by its dark powers... and he decided he wanted it, so at night he seeked out to get it, but when he used black Dranzer it was too powerful for him and he got hurt....so Kai goes to the hospital...Voltaire brings Kai back and turns him into this experiments...his child hood was horrible, he couldn't be happy or he would be beaten, he was trained to be a perfect warrior...so if he failed to do something or was not perfect he would be a reject experiment...and he was...Kai had it hard since he was young...and he hated his grandfather...he only blades for his families honour and pride...