I am trying to figure out the name of a manga were the main character is a female who keeps to herself and just observes people. In the process she is able to learn a lot of details about other characters. What does happen, however, is that she eventually warms up to a group of people and become friends with them. She is also usually able to help her friends using the information she learned by observing everybody.

I remember also in a later chapter she has transferred to another school were she again just watches people.

Warau Kanoko-sama~

thank you