|“||But, it's not beautiful!||”|
— Rei Ryugazaki.
|Also known as|| Rei-chan (by Nagisa)|
Speedo Glasses (by Rin Matsuoka) 
|Height||177 cm (5'10")|
|Weight||65 kg (143 lb)|
|Occupation||1st year High School Student|
|Affiliation|| Iwatobi High School|
Track Team (former)
|Swim Style||Butterfly stroke|
|Japanese|| Daisuke Hirakawa|
Yōko Hikasa (Child)
Rei Ryugazaki (竜ヶ崎 怜 Ryūgazaki Rei) is one of the main characters of the anime series Free!. He is a first year who joins the track team, but later joins the Iwatobi High School swimming team as their butterfly stroke swimmer.
Rei is a tall young man with short, dark blue hair and purple eyes. He wears red-framed glasses. His usual school uniform consists of light brown trousers, a white shirt with a red necktie, a dark gray buttoned up jacket and black and white sneakers. During the spring and summer, he wears his summer uniform that consists of gray trousers, a white shirt with short sleeves and a dark gray collar, a red dotted necktie and the black and white sneakers.
While swimming, he wears black long leg swim pants that have blue patterns on them.
Rei is considered handsome and intelligent because of his looks and good grades. He also has a penchant for beautiful things and the thought of exuding anything but beauty through his actions, causes him to dramatically lose his cool.
Rei may initially seem like a calm and composed character, but he is in actuality quite comical in a sense that he sometimes lets his confidence get the better of him. He is however, depicted to be a hardworking and determined individual, unwilling to relent to his inability to swim despite several failed attempts.
Rei has a theoretical approach when it comes to sports, as he usually calculates distance, angle, and other factors in his mind before actually making an attempt. Because of his rigid nature, he has a tendency to overlook the fun and enjoyment that comes with the activity. As Haruka told Rei, he needed to be "free" in order to swim properly, because he is constantly calculating and underestimating the water.