
when you leave him
there sleeping like an ANGEL in his cot.
Money Heist Season 1, Episode 6

But you never know for certain
what a guardian ANGEL looks like,
Money Heist Season 1, Episode 1

my guardian ANGEL appeared.
Money Heist Season 1, Episode 1

...because you're an ANGEL.
The Big Bang Theory Season 8, Episode 9

Oh, derived from the word "ANGEL."
Appropriate.
The Big Bang Theory Season 4, Episode 22