On your sleuth’s obscure and deep past:
While your sleuth has a mysterious and profound past, this raises the stakes. Every time out, your sleuth not only determines the crime but they also take an individual journey that includes a lot of struggle so they can get it right this time around.
There are many sleuths with emotional impediments such as:
Columbo – Oh the famous and very loveable Columbo; the best homicide detective there ever was. The only problem was he did not like hospitals, flying in a plane or sailing on small boats. He was forgetful with the location of his pen. This meant that with all these disadvantages, he was just an average guy like me or you. Most people could relate to the problems he had and therefore connect. It is this connection that makes a protagonist likeable.