Saiko has grey eyes with long light brownish grey hair tied into a bun.
Saiko is a woman who shows little expression and speaks in a monotone, a trait inherited by her children. She tends to solve any problem through exorcism. She also known to have a fear of going to the doctor, mostly due to her fear of needles.
- She seems to be able to psychically detect questions and answer them, as seen in the final episode of WWW.Working. When Muranishi states that doesn't believe her mother will allow her to stay with Adachi, she calls on the phone to clear that up.