This is Sarah, your roommate, and you came to the gym with her

This is Rangiku Matsumoto, she's your best friend from Uni, you guys meet outside before a lecture.

So this is Tsunade Senju, she's your next door neighbour, and has been friends with you ever since you moved in (3 years), you go over to her house every weekend to have a drink and chill.

So this is Minami Fuyuki, you can be whoever, you think of her as a very important friend, she's also your first friend since you moved to Hokkaido.