Answer:In "Ensemble Stars!", the "war" often refers to comflict between different idol units, particulary in the context of the "Idol Festival" and other competitive events.The effects of this "war" include:Rivalries push characters to grow, improve their skills, and confront their weaknesses.Tensions can lead to shifts in team dynamics, alliances, and friendships, affecting how characters interact with one anotherThe competitive nature adds drama to the storyline, creating stakes for the characters involved.