Spectator

History
Spectator is a unique Teigu in the form of a headpiece with a large eye attached to it. It can be used to read an opponent's mind and to use this to predict their next move, greatly increasing the user's battle ability. Despite this, the user must be in peak physical condition to fully make use of this advantage, as Akame was still able to overwhelm and defeat Zank the Beheader because of her superior speed. It also seems to have the ability to look through solid objects, as after Zank's death it was tried on by Tatsumi, who used it's power to see Mein, Akame, and Schere in their underwear before being rejected by the Teigu. Lastly it capable of casting illusions that bring the most important thing to a person without fail.