When Frenchie stays at the dinner after she flunked out of beauty school who is her guarding angel?

The "guarding angel" in this scenario is Anthony "Tony" Soprano. He's the one who insists that Frenchie stay at the dinner despite her feeling ashamed of her situation. He does this to make her feel comfortable and included, demonstrating his loyalty and concern for her.

While the scene doesn't explicitly use the term "guarding angel," it highlights Tony's protective and caring nature towards Frenchie, making him a metaphorical guardian in her time of need.