Shrieves (shree-v-s) specialize in bringing dangerous criminals to justice. Once given an assignment, Shrieves will travel long distances to capture their targets. They will employ any means necessary to safeguard the public and maintain order.
In general, Shrieves specialize in dealing damage and preventing opposing characters from taking action. If you want a character in your party that deals Stun pretty consistently, this character is a great choice.
(Quoted from the Black Door Shrieve card Etsy page)