Intelligent and composed, Mawata is the seemingly perfect child of the family. However, her outwardly calm demeanor is used as a facade to hide her loneliness and mask her own sense of loss as a result of her father's death. Her only outlet for her emotions are the postcards she sends to Sasame, under the pen name "Miss Silk". Ultimately, Mawata's grief is used by Fenrir to fuel the Great Tree of Fenrir.