The manga you're looking for is Kyou Senshina Mob, Mujikaku ni Honpen wo Hakai Suru (often translated as Berserker Mob Destroys the Main Story Unknowingly A Berserker Mob, I'm Going to Participate in the Main Story
Manga Series: Currently available in Japanese with volumes 1–3 released as a set. You can find these sets from retailers like eBay. The manga you're looking for is Kyou Senshina
"The Eminence in Shadow"
Vera: A guardian figure to Albert who witnesses his hidden strength and dark past. Original Title : Kyou Senshi na Mob, Mujikaku
Original Title: Kyou Senshi na Mob, Mujikaku ni Honpen wo Hakaisuru (狂戦士なモブ、無自覚に本編を破壊する) Artist: Runa Naruno Original Author: Ryousuke Satou Publisher: Futabasha Genre: Action, Martial Arts, Drama, Adventure, Fantasy AI responses may include mistakes. Learn more The manga you're looking for is Kyou Senshina
Unlike many isekai or reincarnation series where the MC carefully manipulates the plot, Al's primary appeal is his unintentional destruction. He treats lethal threats like minor nuisances, causing political and magical ripple effects that force the "main" characters to adapt to a world he is inadvertently breaking.