Mori Saki (森咲樹)
- Nickname: Morisaki (モリサキ), Sakkii (さっきぃー)
- Birthdate: October 12, 1993
- Birthplace: Kanagawa, Japan
- Blood type: O
- Zodiac: Libra
- Height: 165.3cm
- Favorite Food: Sweets with anko
- Least favorite food: Mushrooms, cream, crayfish, carrot
- Favorite color: Pink
- Favorite flower: Osmanthus
- Likes: Ribbons, her mom’s cooking, shopping
- Dislikes: Insects
- Specialty: Typing fast on the keyboard
- Hobby: Collecting ribbons
- Looks Up To: Tsugunaga Momoko
Mori Saki joined Hello! Project as a member of Hello! Pro Egg in June 2004 when she passed the auditions alongside thirty-two other girls.
On January 17, 2011 it was announced that Mori Saki had finished her Egg training. Her next activity would be a stage play.
On March 3, 2011 it was announced that Mori Saki would be part of a dance cover group called UFZS that represents Up Front and womens magazine Josei Jishin.
- Eat’s raw egg and rice for breakfast.
- Has a habit of staring into mirrors.
- Her favorite spot is in her bed.
- Has one sibling, a younger brother.
- As of April 2009 Mori Saki is the tallest Hello! Pro Egg member.