Wonder Girl

Cassie Sandsmark was an adventurous teenage girl who borrowed enchanted artifacts to aid Wonder Woman in battle, impressing the Amazon enough that Cassie boldly petitioned the Olympian gods for powers of her own — setting her on the path to becoming the new Wonder Girl.

Few characters capture the spirit of DC's late-'90s young-hero renaissance quite like Wonder Girl, who burst onto the scene in 1998's Young Justice #3 courtesy of the dynamic creative team of Peter David and Todd Nauck. Born into the Modern Age, she's spent nearly three decades proving her staying power across landmark titles like Teen Titans, Young Justice, and even the delightful all-ages romp Tiny Titans — a range that speaks to genuine versatility. With 148 catalogued appearances and six key issues to her name, this is a character whose footprint in DC's younger-hero landscape is undeniable, sharing pages with the likes of Robin, Superboy, Tim Drake, and even Batman himself. If you're tracing the lineage of DC's next generation of heroes from the Copper/Modern Age onward, Wonder Girl is absolutely essential reading.