This example visualizes a character hierarchy from the TV series Stranger Things as a vertical tree chart. The root node branches into four main groups—The Party, Teens, Adults, and Creatures—which then split into individual character leaves. Using d3.stratify() to convert flat parent-child data into a hierarchy, the layout is computed with d3.tree() and rendered as SVG paths via d3.linkVertical(). Node shapes vary by depth: a diamond for the root, squares for groups, and circles for characters, with colors assigned through a d3.scaleOrdinal.