In Arknights, Mastering the Flying Thunder God

Among the people of Siracusa, an urban legend has long been told. It may not sound very believable, but it's utterly real.

When someone's desire is strong enough, a purple exclamation mark appears above their head, invisible to ordinary people.

At that moment, a handsome, goofy young man radiating golden light will descend from the sky like an angel and appear by your side.

All you need is a little LMD, and he'll grant any wish you want to come true.