Marius Yo (マリウス葉)
Full Name : Marius Schmich Yo Seiryu Julius (マリウスシュミッヒ葉成龍ユリウス)
Nickname : Mari (マリ), Mari-chan (マリちゃん), Mariuchu (マリウチュ), Mayo (マヨ)
Birthplace : Heidelberg, Germany
Birthdate : March 30, 2000
Bloodtype : O
Height : 176 cm
Weight : 56 kg
Feet Size : 27 cm
Joined : January, 2011
Marius Yo is a member of Sexy Zone. He is also a member of Sexy Boyz. He became youngest talent of Johnny’s Jr that debut in 11 years old.
- Favorite season: winter
- Favorite book: Harry Potter
- Favorite movie: Mistery of Spider Wick House
- Favorite color: pink, rainbow color
- Favorite food: white asparagus
- Favorite subject: art
- Favorite place: Heidelberg
- Favorite word: Liebe (Love in Germany)
- Favorite game: card game PHASE10
- Favorite song: Don’t Stop Sexy Boyz, he praised by his teacher
- Ability: ski, piano
- Hobby: drawing
- Family: mother, father, older sister and older brother
- Catchphrase: “Minna Boku ni (wa) Maiusu” (みんな僕に葉（は）マリウス)
- First stage: Hey! Say! JUMP WINTER CONCERT 2010~2011 “Arigatou ~Sekai no Doko ni Itemo~ in Yokohama Arena
- Admired senpai: Nakajima Kento, Fujigaya Taisuke
- Closed senpai: Fujigaya Taisuke
- Pair: Matsushima So
- Got nickname Mariuchu from Fujigaya Taisuke while nickname Mayo from his Junior High School’s friends
- His mother, Akira Yo is a part of Takarazuka
- His older sister, Marilena Yo is a model and love snow boarding. She is also a Tokyo Girls Collection Finalist.
- Able to speak Japanese, Germany, English, Chinese and Kansai Dialect
- His catchphrase is from Yokoyama Yu.
- When primary school, he won gold medal and silver medal from an art exhibition. He was drawing a picture in the park and taken up a German local newspaper.
- Made a bubble bath with a body soap
- He and his mother like Arashi’s DVD then interested in Johnny’s.
- Lived in Germany before entering Johnny’s then moved to Japan to make a debut as Johnny’s.
-  Kodomo Keisatsu
-  Kodomo Keishi
-  Gekijoban Kodomo Keisatsu
-  Akumu-chan The Movie
- Johnny’s Jr Land
- Koisuru Ganbarebu 
- Koisuru Ganbarebu 2 
- Koisuru Ganbarebu 3
- Bakushoukaen Nazebanaru! [2012 – 2013]
- Sexy Zone Channel 
- Fushigi no Kuni no Hello Kitty [2013.04.20]