In the game The World Ends With You, all of these characters act as a game partner with Neku for a week except:

Rhyme cannot act as a game partner with Neku for a week because she is Neku's partner for the entire duration of the game. She plays a central role in the storyline as a supportive and loyal friend, working together with Neku to overcome challenges and uncover the mysteries of the game. Thus, assigning Rhyme as a partner for only a week would undermine her significance and impact on the narrative.