Talk:Tooru Mutsuki/@comment-28254775-20161106134655/@comment-27247962-20161106140610

^I don't know if you noticed over the years of watching and reading manga, but it's also used besides the feminine aspect, to younger people or people lacking in experience (any kind: work, hobby, a natural talent), where the person using '-chan', is aware that they're looked upon as superior and more experienced. So they'll use '-chan' to indicate their willingness to accept the complimenting way someone looks at them & still establish a rather informal, close & friendly relationship. Something like a personal tutor in an area of expertise who guides his younger admirers/coworkers/peers in a personal & lighthearted way. But the difference in age is also important. It seems they only use '-chan' when the age-difference is barely present, so at most 2 years younger or older, depending on the maturity of the person.

But in Mucchan's case it's just Saiko's intuition leaning towards the feminine usage of '-chan'.