Mamako is a kind-hearted, affectionate and motherly woman. Due to her gentle nature, she is very gullible and somewhat airheaded at times. If pushed to her limit, she can be very stern and will often express how upset she is. Most notably, she is considered to be overly-doting on her son, Masato Oosuki. She can become very emotional when scolded by Masato, often begging for his forgiveness. Additionally, she fell to tears when Masato said that he would disown her. She did show some dislike.