Hayato Ike, known as "Glasses Man," stands as a central supporting figure defined by sharp intellect, calm demeanor, and steadfast loyalty. A childhood friend of Yūji Sakai, he anchors their social circle with problem-solving clarity and emotional perceptiveness, earning peer respect through academic excellence and versatile skills. Yet his rigorous commitment to studies and extracurriculars often leaves little room for casual interactions.

Ike nurtures quiet affection for Kazumi Yoshida, who fixates on Yūji. Despite this unrequited longing, he champions Kazumi’s romantic endeavors toward his friend, burying his own desires beneath unwavering loyalty—a tension underscoring his struggle between heart and duty. His emotional insight starkly contrasts Yūji’s obliviousness to Shana and Kazumi’s feelings, driving him to tactfully challenge Yūji’s romantic blindness.

School trips expose his recurring comedic flaw: debilitating motion sickness, particularly during transit. During the hot springs excursion in *Koi to Onsen no Kōgai Gakushū!*, he steps into leadership, balancing efforts to curb the boys’ mischief against waves of nausea. His strategic thinking surfaces when foreseeing Matake Ogata’s retaliation against their peeping scheme, though he ultimately collapses mid-conflict.

His bond with Kazumi shifts subtly across the series. After a heartfelt confession goes unreturned, light novel developments later imply a potential, unspoken mutual connection. Through mediating disputes and offering counsel, he remains the group’s steadying force, exemplified during collaborative student council projects with Harumi Fujita—responsibilities frequently clashing with social engagements.

Though family details remain unexplored, his enduring friendship with Yūji reflects a bond forged through shared adolescence, resilient against time and tangled emotions.