Miko

The Miko is a girl with a Miko Power that gives her the ability to see memories by looking into people's eyes.

Miko Power - Telepathy
When looking into someone's eyes, Miko is able to see one's "surface memories", memories that a person has in mind. This also extends to being able to see related memories to that subject, and the longer she stares into someone's eyes, the more of that person's memories she sees.

This makes her perfect for interrogations, because when asked a question regarding a crime, it's impossible for someone to not think of the question or its answer. This is often how her powers are used.

Trivia

 * She seems to have a weak Fate, as according to Orsted, in all timelines where Rudeus didn't exist, she never reached past the age of 30 and usually died around the age of 10. It's likely that assassins were the cause of her death in these timelines.