Sasaki wears glasses and has a small moustache.
Sasaki seems very wise to how manga works, and for the most part is very level-headed. Once he makes a decision, he sticks to it until convinced otherwise, be it putting Ashirogi Muto on hiatus or voting against PCP 's serialization.
In his past life it seems he used to work alongside Mashiro Nobuhiro to whom he had great respect and still does to present day, and felt displeased to announce the end of his contract. His catchphrase "Mangas need to be good. Only good Mangas will get serialized" seem to have had an impact upon Sasaki's personality. His respect is perhaps best demonstrated when he himself decides to give feedback to both Saiko and Shujin, knowing Saiko is the nephew of Nobuhiro.
- His favorite (real life) manga is Rurouni Kenshin by Nobuhiro Watsuki, which he had also edited.
- In real life, he edited Kochi-Kame (by Osamu Akimoto) for a short period of time, as well as Rurouni Kenshin (by Nobuhiro Watsuki).
- In real life, he uses the US Twitter and posts tweets of Jump fictional characters' birthdays, as well as announcements from WSJ.