Kleif Guillian Almeda
- Stage Name: Kleif Guillian Almeda
- Birth Name: Kleif Guillian Vallejo Almeda
- Nickname: Reiko
- Birthdate: October 27, 2000
- Birthplace: Laguna, Philippines
- Blood Type: O
- Height: 152cm
- Bands / Groups:
- She is a 1st generation member of MNL48 Kenkyuusei.
- She resigned from the group on April 30, 2018.
- Her twin sister is Kyle Guillian Almeda.