Currently watching the entire Pokémon anime
Ash is not an angel in this series. He’s a slapstick irritating over powered butt monkey, and has been that way since SM.From Animedia, an interview with Tomiyasu that's partially centered around this arc and Shirona's return.
The entire issue has a recurring theme of "It's Christmas, so tell us why your angels are the greatest in the world" as an interview subject for the staff of various shows, so that's the primary topic here.
XY Ash is the angel.