Mrs. Morrison is an old, blind woman who appears in the comic "Teenage Mutant Ninja Turtles: Challenges", in the Raphael short story.
Raphael has just had a running battle with a group of Foot Ninja, but after defeating them, he discovers that dozens more are looking for him. Tired, he ducks into an alley to evade them. He leans against a door in the alley, but it is suddenly opened by an elderly woman. Raphael shrinks back, ready for her to scream and freak out, but she does neither. He quickly discovers that she is blind.
The woman, Mrs. Morrison, invites Raphael inside because she assumes he was sent by Mr. Rossetti. There are numerous boxes in her apartment and she needs help moving them into the cellar. As Raphael moves the boxes, he is watched by Mrs. Morrison's pet cat, Lucy.
Once the boxes are moved, Mrs. Morrison serves Raphael a cup of tea. As he drinks his tea, Lucy winds her way around his neck, meowing and purring in his ear. Mrs. Morrison tells Raphael that Lucy used to live in the alley out back and they adopted each other. She says that Lucy doesn't usually get along with strangers. Raphael posits that Lucy likes him because he's a bit of an alley cat, too.
As Raphael prepares to take his leave, Mrs. Morrison tells him that he's welcome back any time. Raphael is surprised and pleased by that invitation.