Despite being Kōichi Minamoto's closest friend, Sakaki have the personality that is almost the exact opposite of Minamoto. He is a Playboy type and loves flirting with almost every beautiful women. He even flirt with director Tsubomi Fujiko when they first met but stopped doing so as soon as he learned her age. He is hot blooded and almost got into a fight every time someone makes him angry.
Despite the fact that he is just 22, he has already graduated school of medicine with the help of his Psychometry. He is shown to be able to diagnose illness from ranging from physical to mental as wel as being able to perform surgical operations. With this he is given responsibility over the well being of higher level espers of B.A.B.E.L.
Like Shiho, Sakaki posses the ability to read a person or object. Sakaki also know how to apply the use of Psychometry into studying which helped him progressed well during his years in medical school.
Body function control
An ability that Sakaki kept secret only revealed when in dire situation. Combining psychometry with his secret psychokinesis ability, Sakaki can control body's function to a certain limit preventing internal damages or even death for a limited amount of time.
Sakaki knows how to fight hand-to-hand combat while his psychometry allows him to foresee his enemy's next movement. Oftenly, he is seen fighting with a long iron bar which further extends his psychometry's range.
- In Volume 18, Shūji and Fujiko Tsubomi became supporters of "The Children" and he gained the codename "The Exploratory".
- In Volume 31, Shūji almost died, but "The Children", Feather and Kyōsuke Hyōbu saved him.
- His name is a based from the 10th chapter of the Tale Of Genji, Sakaki.