Wedy is a professional burglar who was called in by L for her skills, installing bugs in the Yotsuba Group's meeting room to secretly observe the group's weekly meeting. She also provided surveillance on the Yotsuba Kira during the second Sakura TV incident. She was presumably killed by Kira, dying in a road accident on 10 January, 2005. Wedy is also known by her initial "W", just like "L" and other people who have great influence in the organization who hunts down Kira.

Source: Wikipedia