Every time I rewatch 'Berserk', Puck is the tiny spark that somehow makes the darkness feel a little less crushing. Physically he's tiny and nimble — he flies using his elfin wings, darts in and out of danger, and can land on Guts' shoulder without a sound. The anime shows him doing quick, scout-like things: whispering warnings, sneaking around enemy lines, and annoying foes more with annoyance than damage. He isn't a fighter in the conventional sense; his agility and size let him avoid harm rather than trade blows, and he sometimes uses small physical tricks or mischief to distract opponents so Guts can act.
Beyond physical antics, Puck demonstrates actual elfin magic that’s understated but meaningful. Across the various 'Berserk' adaptations he sprays or produces tiny amounts of magical dust or salves that soothe pain, close minor wounds, and help with fatigue — nothing like a miracle cure, but noticeably helpful in the aftermath of a fight. He also emits a comforting glow or light at times that calms people or reveals hidden, supernatural aspects of a scene. Another subtle but important ability is his sensitivity to the supernatural: Puck reacts to apostles, spirits, and the Brand of Sacrifice in ways that signal danger to the viewer and the party. He can sense malevolent presences and sometimes communicates that unease, acting as an early-warning system even if he can’t confront the threat directly.
What I love is how the anime balances his limitations with emotional utility. He’s not a powerhouse — apostles and big demonic forces laugh at his arrows of light — but he fills roles no sword can: morale booster, conscience, and occasional healer. He provides comic relief and heart, but he’s also surprisingly brave, often staying close to Guts through horrors that would flay anyone else. In short, Puck’s abilities are small-scale but versatile: flight and agility, minor healing and soothing magic, a light that exposes the uncanny, and an uncanny sense for supernatural danger. He’s the kind of character whose usefulness is emotional as much as tactical, and I always come away smiling a bit when he flutters into a grim scene.