The specific identities of friends made by time travelers vary depending
on the story background and the works. Time travelers are actually
travelers from the future, secretly collaborating to face the threat of
future human destiny together.
Ruby O'Malley, an expert in temporal displacement, emerges as a pivotal
figure alongside the principal subject in their chronological
traversals, contributing her profound understanding of historical
contexts and her adeptness in navigating the intricacies of temporal dynamics.