Kagome and Hanji's friendship was definitely different. Hanji was mischievous and often got in trouble with other people. Kagome was the one to bail her out of any sticky situation she happened to be in. Then she would turn and scold Hanji.
It was never ending and Kagome wouldn't give up their odd friendship for anything in the world.
Hanji was close with Erwin Smith, Petra's current boyfriend, and Levi Ackerman, Petra's brother. Kagome considered Erwin a good friend, however, Levi was another story. She had never met the man and was curious if she ever would.
