Borocca, a timid and emotionally fragile figure modeled after a weathered umbrella, tends to fade into the background due to his quiet demeanor. His aquamarine-toned form features a collapsible umbrella-shaped head that instinctively unfurls or snaps shut during moments of excitement. Overwhelming emotions—particularly sadness—prompt his tears to unleash torrential indoor rainstorms, sometimes submerging sections of the school.

Deep-seated recollections of his time as an ordinary umbrella linger, including an unrequited affection for a pink umbrella from the human world. This yearning defines his history, culminating in a poignant episode where he pens a heartfelt letter to his beloved counterpart and receives an unexpected reply, rekindling echoes of his inanimate past.

Though habitually reserved, flashes of boldness surface—such as launching himself from the school roof using his canopy-like head as a parachute. His speech trails with a hesitant "-boro," reinforcing his meekness. While easily moved to tears, his emotional surges remain harmless, rooted in an earnest, conflict-averse gentleness. He avoids drawing focus, prioritizing harmony even as his feelings ripple outward with stormy intensity.