Gurimu Igarashi, nicknamed Igaguri, hails from a temple family in Japan's Aichi Prefecture. As an only child, he plays soccer primarily to evade inheriting the temple duties. His father pledged exemption if Igarashi made Japan's national team, driving him to seize the Blue Lock opportunity. Before Blue Lock, he attended Namusan Academy High School and began soccer at age eight.
Igarashi possesses a short, slim build at 172 cm, featuring a shaved head, pronounced eyebrows, and wide black eyes. He notably wears heart-printed trunks beneath his Blue Lock uniform. His jersey numbers evolved from #13 in Team Z (First Selection), to #108 for Team White (Second Selection), and #76 as a midfielder for Germany's Bastard München in the Neo Egoist League.
Pragmatic and determined, Igarashi employs underhanded tactics to survive Blue Lock's eliminations. Initially ranked last (#300) due to poor technical skills, he relied on his "never-give-up spirit" and fear of temple inheritance. He craves recognition, visibly delighting in minor acknowledgments. His pragmatism surfaced early when he kicked balls at opponents like Meguru Bachira and Rensuke Kunigami during the entrance tag test, using teammates as shields. This earned him an annoying reputation, though he frequently interacted with fellow low-ranked player Yoichi Isagi.
His abilities grew significantly in Blue Lock. During the First Selection, he contributed little beyond rare moments like blocking Seishiro Nagi's shot. By the Second Selection, he perfected "Malicia Style"—a dribbling technique luring opponents into fouls by feinting vulnerability before deliberate collisions. He refined it to target challengers approaching his right shoulder, later drawing consecutive fouls from Rin Itoshi in Bastard München's Neo Egoist League match against Paris X-Gen.
Igarashi consistently defied elimination odds. In the Second Selection, he partnered with Ryusei Shidou until Shidou's red card, then used Malicia to help Shidou defeat Kunigami and Reo Mikage. During the Third Selection, he joined Team A but faltered under Shidou's intimidation. Being selected as a reserve for the U-20 Japan match marked a personal milestone. For the Neo Egoist League, he chose Bastard München for its perceived suitability to Japanese players. Initially benched, he played right-side back against France, where his Malicia disrupted Paris X-Gen by provoking two quick fouls from Itoshi. Despite this, he ranked #36 and was eliminated.
Trivia notes include his admiration for soccer player Antoine Griezmann, enjoyment of kimchi hot pot, and dislike of chestnuts. He idolizes celebrity Tsubasa Honda as his ideal type and first crush, watches her YouTube channel, listens to Nogizaka46, and impulsively buys Koala's March snacks. His character color is chestnut brown, referencing his nickname "Igaguri" (Japanese for chestnut burr) and shaved head.