Squirrel Girl

Doreen Allene Green, better known as Squirrel Girl, made her surprising debut in Marvel Super-Heroes #8 (1991) — a one-shot anthology issue that few collectors were paying attention to at the time. Created by writer Will Murray and artist Steve Ditko, she was originally conceived as a lighthearted foil for Iron Man, but her impossible victory over Doctor Doom in that very first appearance planted a seed that would eventually grow into one of Marvel's most beloved cult phenomena. That debut issue is now a legitimate key, and copies in high grade command serious collector interest.

What makes Squirrel Girl genuinely unique in the Marvel Universe is her jaw-dropping win record against opponents who should be completely out of her league. From Thanos to Galactus, Doreen has a habit of defeating cosmic-level threats off-panel or through sheer ingenuity — a running gag that somehow became a defining character trait. Her power set blends enhanced strength, agility, animal communication, and a prehensile tail with an army of loyal squirrels, most notably her longtime companion Tippy-Toe. She's been a member of the Great Lakes Avengers, the New Avengers, and even brushed shoulders with A-Force, making her one of the more surprisingly well-connected characters in Marvel continuity.

Her breakout moment as a true fan favorite came with The Unbeatable Squirrel Girl ongoing series launched in 2015, written by Ryan North with art by Erica Henderson. That run redefined her for a modern audience, blending genuine wit, fourth-wall-aware humor, and surprisingly sharp superhero storytelling. The series earned critical acclaim and a devoted readership, running for 58 issues across two volume launches and producing a number of memorable story arcs and variant covers that collectors actively chase today.

For collectors, Squirrel Girl's books represent a rare intersection of accessibility and long-term upside. Marvel Super-Heroes #8 is the key to own — a low-print anthology issue that predates the character's popularity by decades, making high-grade copies genuinely scarce. The 2015 Unbeatable Squirrel Girl #1 is a modern key worth grabbing in 9.8, and variant covers from that run have built a passionate secondary market. Whether you're hunting golden keys or celebrating Marvel's most surprisingly formidable hero, Squirrel Girl's bibliography punches well above its weight.