Tetsudō "Poppo" Hisakawa, a cheerful and adventurous soul, thrives as the spirited heart of the Super Peace Busters—a childhood circle including Jinta "Jintan" Yadomi, Naruko "Anaru" Anjou, Chiriko "Tsuruko" Tsurumi, Atsumu "Yukiatsu" Matsuyuki, and Meiko "Menma" Honma. His youthful energy and admiration for Jintan, whom he routinely praised as "amazing" or "cool," masked a quiet gratitude toward the group for embracing his childhood social awkwardness. As a boy, Poppo sported a compact frame crowned by shaved hair reduced to gray fuzz, paired with a blue short-sleeved hoodie, blue-green track pants, and vibrant yellow shoes. Menma’s untimely death reshaped his path, propelling him into global wanderlust funded by odd jobs. Between travels, he retreats to the group’s weathered secret base, driven by a fervent desire to reunite the fractured Super Peace Busters. Convinced Jintan bridges the living and the spectral, Poppo boldly pledges to Menma’s spirit to fulfill her final wish, positioning himself as the group’s peacemaker during tensions. Yet beneath his easygoing facade simmers unresolved guilt over his indirect role in her demise. Adulthood grants him a taller, leaner stature, mid-length brown hair, and warm brown eyes. His eclectic wardrobe blends a lilac bandanna, layered shirts—white beneath a patterned blue collared button-down—olive cargo pants adorned with leg pockets and a dangling blue pearl necklace, and strapped sandals. A pendant pouch cradles blooms from Menma’s resting place, a poignant keepsake. Poppo’s journey molds him into a mellow globetrotter tethered to childhood bonds, his guilt and loyalty intertwining as he navigates reconciliation, mediation, and the quiet weight of a past he strives to amend.