Such is Usopp, the sniper of the Straw Hat Pirates in the anime and manga series One Piece, who developed his own set of tactics distinct from those of his physically stronger allies. Having been part of the Straw Hat Pirates, Usopp had to fight several mighty enemies during his journey. Unlike his friends, who either use brute force or supernatural powers, Usopp's strength lies in his mind as an analyzer and his creativity in fighting.
Usopp's most used weapon is his slingshot. He is also very accurate with it. He made a few types of ammunition for different situations that he faces through the story, such as exploding pellets, smoke bombs, and seed ammunition that grows into carnivorous plants. One of the many innovative techniques of Usopp involves the use of Dials originating from Skypiea, which have the ability to store and release various elements. He can show a Breath Dial that stores flammable gas, which can later be ignited to create an explosion attack.
Usopp's general strategy in combat usually involves seeking vantage points to get as far as possible from his opponents in order to support his crew. Thus, with the role of a sniper, he is able to get vital information about the battlefield and enemy movements. His tactical acumen supports the ability for him to devise cunning strategies on the fly and often reverses the tides against foes who are physically superior.
One of the most memorable fights of Usopp was during the Dressrosa Arc, in which he had to fight Sugar, one of Donquixote Pirates' members. During the fight against Sugar, Usopp tricked her with his "Bagworm" to avoid attacks and used "Hissatsu Midori Boshi: Impact Wolf" to finish the opponent. This battle proved he could win against very formidable odds if ingenuity was combined with precise marksmanship.
Usopp has been constantly upgrading his techniques and arsenal throughout the series. His weapons have evolved from mere pellets to more sophisticated ammunition, which now includes even the "Pop Greens"—seeds that grow to become several plant-based weapons. Constant innovation reflects upon Usopp's adaptability and resourcefulness against ever-increasing enemies.
Usopp's combat tactical skills bled into non-combat situations. He has demonstrated a sharp ability to analyze complicated situations and come up with effective plans. For example, Usopp used the alias "Sogeking" in an effort of conquering his fears and thus helping the crew for Nico Robin's rescue mission in the Enies Lobby Arc. It wasn't just a psychological tactic by which he contributed to the mission, but also it brought to the forefront his creative thinking skill.
Although Usopp isn't as physically strong as some of the other Straw Hat Pirates, his tactical abilities and marksmanship skills have saved them many times. He has developed a unique way of fighting that combines long-range attacks with clever strategies, often standing him up against strong enemies and of great importance to the victory of his crew.
Though the series is on its course, speculations have been made for possible power-ups as far as Usopp goes. Some fans are really certain that he will finally develop advanced forms of Haki, the mysterious power system of One Piece. To note, this would be fan theories and remain so unless explicitly written within the original manga or anime.