Mamoru Bodai

Name: Mamoru Bodai (listed as "Secret" in AI)
Sex: Male
Age: Unknown
Birthday: May 25
Profession: So's Bodyguard (in AI) | Tokiko's Secretary and Bodyguard (in AINI)
Likes: Boobs, Erotic novels (AI) | Tokiko (AINI)
Dislikes: Men, Males, Testosterones
Hobbies: Swimsuit magazines (AI) | Making Scrap Books From Tabloid Magazines (AINI)
Skills: Self-defense, Martial Arts (AINI)

In AI: The Somnium Files:
He is one of So's many bodyguards. Even thought they look alike, they are not clones. They all wear face masks to hide their identity.

In AI: The Somnium Files - nirvanA Initiative (Past):
Previously worked under So Sejima, but is now the secretary and bodyguard of Tokiko Shigure, the president of Naix Japan. Not the best personality, but is loyal to his employer.

From the in-game character descriptions