Dian Marie Mercado
- Stage Name: Dian Marie Mercado
- Birth Name: Dian Marie Rele Mercado
- Nickname: Dian
- Birthdate: June 30, 2002
- Birthplace: Davao City, Metro Davao, Mindanao, Philippines
- Blood Type: A
- Height: 154cm
- Specialties: Spoken poetry and drawing
- Bands / Groups:
MNL48 Song Participation
|Aitakatta||Skirt, Hirari||Team L|
|365 Nichi no Kamihikouki||365 Nichi no Kamihikouki|
|Igai ni Mango||Team L|
|Kimi wa Melody||Gingham Check||Undergirls|
|High Tension||High Tension|
- Originally a 1st generation member of MNL48 Kenkyuusei on April 28, 2018, she was promoted to Team L upon its formation on May 2, 2018.
- Her favorite colors are peach, black, and white.
- She admires Kashiwagi Yuki and Oshima Yuko.
- Her favorite AKB48 song is "47 no Suteki na Machi e".