Your ability was your angel wings, which you only used when necessary because they were hard to manage

You were in Sky Casino, standing near Sigma, when a customer started to make a fuss about something being wrong with the result of the poker game he played

When Sigma tried to be calm, the customers were only angered more and more. He finally grabbed a bottle and tried to attack Sigma with it

Out of reflex, you've spread your wings in front of Sigma, protecting him from the bottle