Yatagarasu's Badge

The Yatagarasu's Badge is a treasured possession of Kay Faraday, which she wears at all times to show off her identity as the great thief Yatagarasu. When she was attacked and lost her memory, Miles Edgeworth held onto the badge for her and used it to remind her of her real identity. Following his resignation, he kept the badge in place of his own Prosecutor's Badge, though he returned it to Kay once he was reinstated.