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.