The main people behind the Boruto manga are Ukyo Kodachi and Mikio Ikemoto. Their collaboration has resulted in an engaging and popular manga that expands on the Naruto universe.
In Boruto manga, some significant characters have met their demise. The deaths often play a crucial role in driving the plot and adding drama. However, specific names depend on the latest chapters and story arcs.
It could be a rogue ninja who has a personal vendetta against Boruto's family. This ninja might have caused harm to Boruto's father Naruto in the past, and now Boruto is determined to make him pay.
It could be the Kara organization. They've been shown to be interested in Boruto's Karma mark in the original series, so they might have finally made a move to abduct him in the fanfic.
No, Boruto is alive in the manga. The plot hasn't led to his death. However, the manga is ongoing, and anything could happen in the later developments.