Adoptive Mother (in "The Adoption Papers")
Adoptive Mother is a character in the poem "The Adoption Papers." She adopted Daughter after Birth Mother gave her up for adoption. In the poem, Adoptive Mother reminisces about Daughter's life and looks back fondly, longingly, and lovingly at Daughter's early life, recognizing that Adoptive Mother is aging. Adoptive Mother also wonders if Daughter looks at her differently as she ages and grays. She is a loving and caring woman.
Grandmother (in "My Grandmother")
Grandmother is presumably the author's own grandmother. The author lovingly describes her as "like a Scottish pine" and "proud" and "plentiful." According to the author's description, Grandmother has been through quite a bit in her life ("her face is ploughed land"/"her face as tight as ice") but still remains proud and as tall and strong as a Scottish pine.
Unnamed Narrator ("The Telling Part")
The unnamed narrator of "The Telling Part" longs for the return of his mother, who is "away far away" living a totally separate life from the narrator. The narrator doesn't know their mother, but they very clearly still love her despite her absence from their life.
The narrator is either a young person or is intellectually challenged, but his thoughts surrounding his mother and his life are very nuanced and complex and chock full of emotion.