- Name: Fukuda Marine (福田真琳)
- Birthdate: October 18, 2004
- Birthplace: Shanghai, China
- Hometown: Nagasaki, Japan
- Blood Type: AB
- Specialties: Ballet, English certification level 2
- Hobbies: Eating, playing the violin
- Looks Up To: Kishimoto Yumeno, Akiyama Mao, Dambara Ruru
- Hello! Project groups:
- Tsubaki Factory (2021–)
Fukuda Marine was announced to be a winner of the Hello! Project "Juice=Juice" "Tsubaki Factory" Goudou Shin Member Audition in a surprise reveal during episode #383 of Hello! Project Station. She would join Tsubaki Factory alongside fellow audition winners Kasai Yuumi and Yagi Shiori, as well as Hello Pro Kenshuusei member Yofu Runo. Their activities with the group began at the Hello! Project 2021 Summer Sapphire & Ruby concerts starting July 17.
- TV Programs
-  Ikuze! Tsubaki Factory (行くぜ!つばきファクトリー)
- [2020–] Hello! Station (ハロ！ステ)
- She is the first memmber of Hello! Project to come from Nagasaki Prefecture.
- Her number during her audition was #147.
- Her favorite Tsubaki Factory song is "Fuwari, Koi Dokei".
- Her favorite colors are aqua blue and white.
- Her favorite music is various types of pop music.
- Her favorite sport is skating. Her childhood dream was to become a skater.
- Her motto is "Oka reta basho de saki nasai" (置かれた場所で咲きなさい; Bloom where God has planted you).
- Her favorite food is kamaage udon.
- Her favorite animal is the quokka.
- She has used the romanization "Marine" since childhood, after being given the name in English by her mother.