I read a manga good time ago its about a detective and his partner helping a girl that is in a mental institution but she can see guardian spirits and helps the detective out but he keeps getting demoted and later he can also see guardian spirits they find out that the girl is something similar to a doppleganger if someone knows the name of this manga it would help me out some much thank you

Arcana Soul was the title, I believe.

Current avatar features Badou from Dogs.

thank you very much that is exactly what i was looking for