Lin Yu, who was a military enthusiast and internet joker in his previous life, was reborn in the world of bright swords and became the leader of the new third regiment of the 386 brigade. He has a cheerful and humorous personality and loves to tell cold jokes, but he is clear-headed and has bold tactics at critical moments. Possessing modern military knowledge, he is good at raid warfare, mobile warfare and tunnel operations, and can also use cross talk-like comments to resolve tensions in the troops. His initial abilities are average, but he gradually grows by relying on his "dog-headed strategist" style operations and a wealth of cold knowledge about World War II.
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