Saturn in 12th House
A person with Saturn in 12th House has the following characteristics:
There is a tendency that guilt and despair derived from his/her unconscious mind without a clear basis create his/her melancholic and worrying personality and his/her pessimistic and introspective mental structure which is susceptible to remorse.
While on the inside he/she might even enjoy them masochistically.
He/She doesn't want others to know his/her inner conflicts and tries to settle them by him/herself secretly.
He/She places a base, where he/she can live a solitary life and can get security, in a place isolated from the public and tries to devote him/herself to some kind of work or activity that he/she is satisfied with or to live in seclusion like an escapist or pessimist.
There is an implication that he/she has hidden enemies who could be rather older than him/her or could be people who have authority like a father.