- Name: Mori Saki (森咲樹)
- Nicknames: Morisaki (モリサキ), Sakkii (さっきぃー)
- Birthdate: October 12, 1993
- Birthplace: Kanagawa, Japan
- Blood type: O
- Height: 165.3 cm
- 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
- Hello! Project groups:
- Up-Front groups:
- Gatas Brilhantes H.P. (2012–)
- TV Programs
- [2011–] R no Housoku (Ｒの法則)
- [2011.04.02–] Up-Front Girls
-  Charge 7:30! (チャージ730!) (as Charge Girl!)
- [2006.06.14] Tokito Ami Hatsu Live '06 Haru ~The Nakano Sampler~ (時東ぁみ初ライブ '06春 ～ザ・中野サンプラ～)
- [2007.02.10] Country Musume LIVE2006 ~Shibuya des Date~ (カントリー娘。LIVE2006～Shibuya des Date～)
- [2007.09.22] Hello! Pro Egg Delivery Station! 01 (ハロプロエッグデリバリーステーション！01) (with Kikkawa Yuu, Ogawa Saki, Kitahara Sayaka, Aoki Erina)
- [2007.11.03] Reverse! ~Watashi no Karada Doko Desu ka?~ (リバース！～私の体どこですか？～)
- [2008.03.12-20] Nakano Blondies (中野ブロンディーズ)
- [2010.02.04] Cat-eyes Club 2
- [2010.03.19-24] La Corda d'oro Stella Musical (金色のコルダ ステラ・ミュージカル) (as Hino Kahako)
- [2010.06.14/17/25] Fashionable
- [2011.03.08-17] Aru Jiisan ni Sengou wo (あるジーサンに線香を)
- [2011.10.08-17] Reborn~Inochi no Audition~ (リボーン～命のオーディション～) (as Akechi Mitsuhide)
- Eats raw egg and rice for breakfast.
- Has a habit of staring into mirrors.
- Her favorite spot is in her bed.
- Has a younger brother.
- As of April 2009 Mori Saki was the tallest Hello! Pro Egg member, before completing her training.
- Took part in the second idol wrestling event produced by Tsunku, "Dai 2 Kai "Shinken Onna no Jin The☆ Killer Contents!", on 12/29/2010.
- It was announced on January 17, 2011 that Mori Saki had finished her Egg training. Her next activity would be a stage play.
- In January 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.
- In November 2011 she was accepted into a University.