Jay is a young man who uses iron eres, and tends to appear and disappear without notice. He is always coolly watching the situation from one step away. He is especially good at information analysis, and therefore often finds work as a strategic advisor.

His tendency to let fly with cynical remarks about those around him make for a less-than-socially-acceptable personality. However, it seems that there are some to whom he will show his younger, boyish side.