"I'm with you, my angel," is a quote from the book Nightfall by L.J. Smith. The quote signifies a strong bond and reassurance between characters, highlighting themes of loyalty and connection. It reflects a moment of comfort and support, emphasizing that the speaker is present for their loved one regardless of circumstances.

In the story, these words deepen the emotional intensity and symbolize trust and devotion. L.J. Smith uses this quote to showcase the importance of being there for someone, conveying a sense of unwavering commitment amidst the challenges faced by the characters in Nightfall.