It was common in Inaba. In fact, it's how my comrades awakened to their personas, other than my "big bro." He had the pleasure of simply obtaining Izanagi from the start, and I resented him so much that I sought to obtain the power for myself.

[He fires with a snarl, not at Akira, but at his past self. He was so bitter. So spiteful. So... scared.]

So even though I was a Wildcard, the instability in my heart caused my Shadow to take form.