faker:
(plural: ‘fakers‘)

a faker (R) faking tummy ache
a person who fakes;
a cheat;
a fraud;
an impostor;
a pretender,

a faker with different disguises, one for each occasion
The students of class nine think that their geography teacher is a faker because, though she claims she had a master’s degree in Geology, she finds it hard to answer any random questions on topics she hasn’t prepared in advance.
The society is full of fakers who fake their real intentions and feelings when they talk about general social issues, such as corruption, domestic violence, global warming, etc.
Some businessmen believe that the world of business is a fake and all the businessmen are fakers, and they come up with these arguments in support of their belief that a businessman never tells his clients or customers what he thinks of them and some of the world renowned business strategies are mere pretensions!
According to some psychologists, most of the social activists and human rights advocates are fakers working for the benefit of whichever organisation or political party that supports and funds their activities.
