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Rei Ryugazaki
Rei Dive to the Future.jpg
Kanji 竜ヶ崎 怜
Rōmaji Ryuugazaki Rei
Also known as Rei-chan (by Nagisa)

Speedo Glasses (by Rin) Big Brother Butterfly (by Ren and Ran)[1]

Gender Male
Sign Sagittarius
Birthday December 14th
Age 15-16

17 (Dive to the Future)

Height 177 cm (5'10") (Free!)

179 cm (5'10") (Dive to the Future)

Weight 65 kg (143 lb)
Professional Status

3rd year High School Student

Education Iwatobi Badge.png Iwatobi High School

Junior High School (former)
Elementary School (former)

Clubs Iwatobi High School Swim Club

Track and Field Club (former)


(Iwatobi High School Swim Club)

Swim Style

Butterfly[2] (specialty)

Events 100 m butterfly

4×100 m medley relay

Personal Status
Relatives Father

Older brother

Anime Episode 2
Voice Actors
Japanese Daisuke Hirakawa

Yoko Hikasa (child)

English J. Michael Tatum

Rei Ryugazaki (竜ヶ崎 怜 Ryuugazaki Rei) is one of the main characters of the anime series Free! He is a butterfly swimmer and a 3rd-year high school student at Iwatobi High School. Rei is a former member of the track team of Iwatobi High School before being recruited by Nagisa Hazuki for the Swim Club. After Haruka Nanase and Makoto Tachibana graduated, he became the new captain of the swim club.


Rei Full.png

Rei is a muscular young man with short, dark blue hair and purple eyes. He wears crimson-framed glasses because he is near-sighted. His fall and winter school uniform consists of light brown trousers, a white shirt with red necktie, a dark gray unbuttoned blazer, and black-and-white sneakers. During the spring and summer, his summer uniform consists of gray trousers, a white shirt with a dark gray collar, red dotted necktie and black-and-white sneakers. His uniform as a 3rd-year would change only in the color of his necktie being green. While pole vaulting, he wears a pair of orange lens sports glasses, white sleeveless sports top with yellow and black stripes, shorts, black short-legged tights, and blue spike sneakers. While swimming, he wears black, long-legged swimskins with a blue pattern. The most developed muscles of his form are his tricep and abdominal muscles (upper arms and abdomen).


Rei is an intelligent and logical individual with a penchant for beautiful things, the thought of exuding anything but beauty through his actions causing him to dramatically lose his cool.[3][2] He is also quite comical when he lets his self-doubt get the better of him. He is, however, a hardworking and determined individual, as seen in his relentless drive when learning to swim despite several failed attempts.[2][4][5]

Rei has a theoretical approach when it comes to sports,[3] 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.[2]



Main article: Rei Ryugazaki/Story


Is that supposed to be butterfly? Pathetic!
Rin Matsuoka, about Rei's stroke.[6]

Current stats (season one):

4/5 REI STATS.png
Mental Strength
Water Repellency

Expected stats:

5/5 REI STATS.png
Mental Strength
Water Repellency


Main article: Rei Ryugazaki/Relationships


Main article: Rei Ryugazaki/Music

Creation and Conception

Various hairstyles of Rei.

Hiroko Utsumi said in one of the interviews that Rei initially felt cool like Haruka did, but as soon as he opened his mouth and started to frolic, that similarity ended immediately. She added that he was the type of person girls would complain, "he looks so cool, but it's such a shame he had to open his mouth...". He's said to be a quibbler in the theory side of things, but have a problem in the heart of things. His face immediately expresses whatever he feels, so he's easy to read. He loves beautiful things, so his appreciation of beauty is very high. His sense of beauty overdoes it to the point where he always tucks his shirt in. Utsumi said to look closely and you will see he does everything properly, even ensuring the straps on his backpack are perfectly tight around his uniform.


  • Like all members of the Iwatobi High School Swimming Club, Rei has a feminine name.
  • During a field trip in fifth grade, Rei accidentally left his underwear in the bath.[5]
  • Rei is the only member of the Iwatobi Swimming Club that has his body hair shaved (done by Nagisa).[7]
  • Rin described Rei's stroke pathetic.[6]
  • Rei owns a black and white mobile phone.[8]
  • Rei likes eating sushi.[9]
  • Rei likes reading, running, calculating and pole-vaulting.[9]
  • Rei's best subjects are Math and Chemistry, while he's bad at Art and Music.[9]
  • According to Rin, Rei has horrible English pronunciation.[1]
  • According to Rei, the Ryugazaki family has been pairing melon bread with barley tea since his grandfather's time.[10]
  • His motif animal is a butterfly.
    • Rei's animal is unique compared to the other characters' as his is the only non-aquatic animal. This is commonly interpreted to be due to the fact he was not originally a swimmer and that butterflies change "paths" during their lifetime.
  • He suffers from motion sickness.[11]


  1. 1.0 1.1 Episode 11 Preview
  2. 2.0 2.1 2.2 2.3 Episode 4
  3. 3.0 3.1 Episode 3
  4. Episode 5
  5. 5.0 5.1 Episode 6
  6. 6.0 6.1 Episode 8
  7. Iwatobi High School Swimming Club's Diary 1: Track 1
  8. Episode 9
  9. 9.0 9.1 9.2 Free! TV Animation Guidebook
  10. Episode 11
  11. Episode 30