Psychology is very interesting subject. You will enjoy if you go depth of subject.
As per psychology there are three types of manipulators.
1. Positive Manipulator
2. Egocentric Manipulator
3. Malicious Manipulator

1. Positive Manipulator: Manipulates for the benefit of others or for good purpose

2. Egocentric Manipulator: Manipulates other to satisfy his/her own EGO. Not interested in loss/damage to others.

3. Malicious Manipulator: Main aim is to destroy / damage others.

First type of manipulator is good for we have to save over selves from (2 and 3 types) rest two types of manipulators.