Based on the provided text, describe Damu Anna and his role in the incident with Mavshibai.

Damu Anna was an elderly devotee of Sai Baba, described in Chapter 24 as having crossed fifty years of age and having no teeth. During the incident, his service consisted of leaning forward and slowly pressing Baba's left hand. He became an unwilling participant in a quarrel when Mavshibai, while vigorously serving Baba, brought her face close to his and then jokingly accused him of trying to kiss her. Anna reacted with anger, retorting, "Am I a fool or completely mad? You yourself put your face to my face and are ready to quarrel with me." His anger was only cooled by Baba's humorous and wise intervention.