The Angel Of Death
The lady wings were gorgeous like a butterfly with different colors and the boy has a dragon fly like wings that flickers such colors when he moves depending where it will reflect.
"Greetings, seven souls," says the beautiful lady fairy, bowing her head slightly and back to glancing at them. "We've come beforehand to warn all of you. The inside of our city is under repair for years now and we can not show you around. Once you entered, I, Hatte the guardian of Ki and Tosh, the guardian of Midori will activate our Sekai."
"When you step inside the gates and remained in our Sekai after the gate closes, we will not hesitate to kill any of you," Tosh warned.