Obviously Sayori is going to genki at Angus and excitedly engage him about Caleb Cleveland!! With genuine interest and enthusiasm!!! Her contribution to this topic is that she is also a writer and lover of stories! She'd be willing to show him her poems and magic rhyming notebook from Lyrabar if he showed any interest in her writing. She would also love to read some Caleb Cleveland with him--she can talk writing style! Plot development! Characterization! In simple terms but she does have an understanding of these things even if she does not have a very academic vocabulary.

Oh and u know Ango is gonna get a magically warm chocochip cookie. This is the established Sayori Gesture of Friendship.