Tom deploys her as a trap for Jerry. He drives up to her, thinking she's a girl mouse, kisses her and then she explodes, leaving his face covered in bomb ashes. All that remains of her is her head and spring arms and legs, and she then runs off.
She has the appearance of a white female mouse with blonde curly hair, blue eyes, rosy cheeks and pink lips. The insides of her ears are pink, and she also appears to be wearing a long pink dress, pink shoes and white elbow-length gloves. Her "tail" is actually the fuse of the bomb.